This is a little far from the usual BI topics, but I think it's pretty exciting regardless. Microsoft Silverlight 2.0 has been released. You can download the bits and the development tools on the official Silverlight web site. There is also a great blog post from Scott Guthrie that describes the 2.0 platform and lots of resources that are available to Silverlight developers.
I don't know about you, but as a developer who has to play in the UI tier occasionally, this is the release I've been waiting for. Check it out!
 Finally! I can't remember the last time there was a product that I'd been hearing about and seeing so much of for so long before it was released.