Just released today, you can find the release here.

The highlights of what is new in Beta 3:

What's New in IBM^® Lotus^® Symphony^TM 3 Beta3?
General Quality Improvements

• Improved ODF file fidelity to better support processing files which were generated by previous versions of Lotus Symphony
• Fixed key Mac OS specific stability, functional and usability bugs
• Fixed Lotus Symphony Presentation table functional and usability bugs
• Improved memory leak issue during long run of Lotus Symphony
• Fixed additional bugs on general stability, function, usability and Microsoft Office interoperability

New Features

• More VBA APIs are supported
• Ability to customize toolbar content and layout
• Enabled Sidebar panel management to show or hide sidebar panels
• More sidebar pages and sections containing new property controlling
• Spreadsheet cell appearance, including cell borders
• Graphic
• Word processor page settings, including margins
• More sidebar panels in presentation editor
• Color palette, eyedropper, image animation, and 3D effects
• Enabled Live Text support
• Enabled file encryption and password protection with Microsoft Word and Excel files
• Support for "Open in new window." Users can use Command+~ on Mac OS and Alt + Tab on XP/Vista to switch windows
• New clip art gallery
• More template files

Enhancements

• Enhancements in Accessibility support
• Enhancements in BiDi localization support
• Enhanced copy/paste interoperability between Lotus Symphony and Lotus Notes
• Document header and footer function enhancements and usability improvements
• Enabled multiple calculation in one sheet of the Lotus Spreadsheet editor, including mixed sort and filter, as well as multiple sort areas
• Enhanced the usability in manipulating color property with new color picker controls
• Fixed Audio/video related defects and enhanced the user experience
• Enabled new progress bar to launch and load/save files
• Refined main menu and toolbar contents
• Enabled sorting instant filters in Lotus Spreadsheet
• Disabled Autosave during Lotus Presentation slide show to avoid the unexpected interruption
• Added one click link to LotusLive website on homepage
• Various additional user experience enhancements
• Significant enhancement in online help content and structure

IBM Lotus Symphony 3 Beta 2 Release Notes

• Please refer to this link for Lotus Symphony 3 Beta 2 Release Notes

Key Bug Fixes
Symphony Forum defects

• Japanese characters overlap with English characters which is caused by incorrect text parsing in presentations.
• When the Lotus Symphony window is in front and active, the standard keyboard media keys on certain laptops do not work.
• When opening a sample document which in essence is a XML Form document in Lotus Symphony, the contents are read-only.

Linux

• The floating windows in Lotus Symphony go behind the main window when you move cursor focus to the main window.

Mac

• Open any presentation document in Lotus Symphony. Resize the screen in the System Preferences, and then switch back to Lotus Symphony. You cannot click any elements in the editor.
• The mouse cursor position is incorrect when using a secondary monitor on Mac.
• In Lotus Symphony Spreadsheets,dragging a sheet tab does not work on Mac.
• When you move the mouse pointer over one of the sidebar boundaries, it does not change to a drag or move pointer to show that the sidebar can be re-sized.

Language Related Fixes

• If a document contains DIYMJ0120 font, Lotus Symphony crashes when opening the document.

Lotus Symphony Documents

• When working in a multi-page document, the cursor may jump back to the first page.
• Open a Microsoft Word document which has a table with text wrap around it, the table cannot be displayed correctly.
• Create one document in ODF 1.1 format, which has grouped connector objects. Lotus Symphony crashes when opening the document.

Lotus Symphony Presentations

• Open some presentation files which contain polygon graphics with line properties in Lotus Symphony. The polygon graphics cannot be displayed in screen show.
• Create a presentation in Lotus Symphony and add some shape and connector objects.Then save the file and reopen it in Lotus Symphony. It's very hard to select the connectors.
• Pie chart does not display when the Microsoft Office PowerPoint file is opened in Lotus Symphony.
• Lotus Symphony crashes when modifying "Text Animation" to "Group text->As one object".
• Insert a chart in Slide Master View, press Esc and close the file. Lotus Symphony freezes.

Lotus Symphony Spreadsheets

• Empty line appears when deleting rows in DataPilot source area.

General usage

• When you attempt to re-install Lotus Symphony of the same version, you will get an error message and cannot continue to install.
• Paste an image from Lotus Notes to Lotus Symphony 1.3 document, and then save it. Open the document in Lotus Symphony 3 Beta 3,the image is invisible.
• Lotus Symphony crashes when double-clicking to edit formula in an equation.
• Create a file which includes a table on Mac, and then open it on Windows,the table becomes higher and out of the page.
• Lotus Symphony cannot open the files with the name containing %20.
• The pictures of link objects in Microsoft documents are lost when loading the documents in Lotus Symphony.
• Lotus Symphony cannot be launched by the shortcut icon after upgrade with the Symphony preload icon displaying.
• Lotus Symphony crashes when clicking Tools->Macros->Run Macros.