Waveboard wraps the Web presentation of Google Wave in a desktop application and is ready for direct use, without the need of installing Google Gears or other tools. It also adds notifications to keep you updated about new or changed waves. Keyboard shortcuts are mapped to combinations that Mac users expect to work. It also adds the possibility to print and save single waves which is not possible with regular browsers by now. It also works together nicely with the Waveboard iPhone App which is available from the AppStore.
What's new in Waveboard
With Safari 5 also the browser engine in your Waveboard app got updated automatically. But sadly Safari 5 in 32 bit mode does not play nicely together with Google Wave so wave throws an error message. So Waveboard had to switch to 64 bit now too. But Google Gears needs 32 bit, therefore we also needed to remove support for the Gears plugin. Anyways, Gears is not supported any more by Google so it should be ok while HTML5 browsers are getting better.
Other issues like custom domain support, multiple accounts and more will be addressed in a later major release.
Google Wave is dead: