• Post toolbar loads on demand, instead of all the time (this significantly improves widget load times)
• New widget script context (WIKI)
• New widget load events (WIKI)
• Excerpt modifiers (after your post description, usually something like "..." or "more...") can now be HTML (including foreign characters) instead of only English text. There'll be a blog post or a Wiki article on this in the near future

Admin

• Widget Builder: Added Advanced config section on the Edit HTML page. Has new setting to control Script Context feature
• Widget Builder: Changed code editor for Edit HTML, improved syntax highlighting, now works in FireFox, Safari, and Chrome
• Widget Builder: Added full screen option for code editor
• Added new popup to manage author-defined event names (no more "Custom1," "Custom2" events)
• Modified reporting page to show said author-defined events
• Promote > Sharing: Added "custom" theme option for further customizing Gigya

Facebook

• Add widget to profile button on widget's canvas page
• Add widget to Boxes, under "Edit" section and "Edit" dialog