GWT 1.5 M2 Offers Support for Java 5
* Some widgets now have animation effects. Popups, trees, etc. have subtle animation effects to provide visual cues when hidden and shown.
* The addition of a "Showcase" sample. This sample combines features from several other samples and demonstrates the new, nicer-looking GWT default stylesheet and widget animations. Note that the default style is still in flux and is likely to change.
* Keyboard support has been added where previously absent in UI classes, including in menus and tab panels.
* ARIA support for enhanced accessibility is now present in most widgets, including menus, trees, tabs, and button variants.
* Bi-di. Widgets and panels have built-in support for bi-directional layout.
* There is a single Mac OS X distribution that works on both Leopard (10.5) and Tiger (10.4).