Aaron Brazell @technosailor has a review of the new version of Word Press 2.5 on his post http://technosailor.com/2008/03/18/10-things-you-need-to-know-about-wordpress-25/ . The version is not ready for mainstream yet and the official release date is yet to be announced.
After reading Aaron's post here are the 3 things that i am excited about:
a) Image Flash Uploader - I like to use a lot of images in my blog posts
b) TinyMCE support for the visual editor.
c) TimeStamp functionality overhaul
Thanks Aaron for a great summary.