Microsoft Office 2010 Information
If you're eagerly awaiting the next release of Microsoft Office, you can find some early information at the new official Office 2010 blog. There's not much news there yet, but you can subscribe to the RSS feed and read any updates as they're posted.
Also, there's an Office 2010 web site, where you can apply to join the Technical Beta. I've signed up -- did you?
Ask your questions in the Office forums on the Microsoft site.
For Excel related news, watch the Microsoft Excel blog. They did a great job leading up to Excel 2007, and I hope they'll do the same for this version.
There are even a few screen shots in the Microsoft press gallery.