1st
Dive into Wordpress 2.5
Jotun at 
BookMarkMoney.com weighed in on the new version of WordPress:
If you’re at all familiar with WordPress, you noticed that version 2.5 was released. If you’re like me, your WordPress Dashboard is nagging you incessantly about upgrading. Seeing as how the new version is a feature release, not a security release, I don’t truly feel compelled to update to version 2.5 yet. I’ve spent almost two months hammering this site into a shape that I like, and until I know that the plugins I use are compatible with the new release, I think I can resist the temptation fo upgrade.
The Roundup:
Dougal Campbell
Peter Westwood
WordPress DevBlog
Lorelle on WP
Weblog Tools Collection
Developer Alex King has been hard at work updating his plugins. I expect a lot more updates from various developers are in the works.