http://msmobiles.com/news.php/2747.html
It's from a smartphone site, but reports on the TechEd conference in Amsterdam this past July. Estimates Mobile 2005 shipping Summer 2005 (maybe a good reason to hold off on that X50 purchase!). Some of the main points:
SQL CE & NET Compact Framework 2.0 will be embedded in ROM
3D graphics, supporting hardware 3D acceleration
Dr. Watson comes to Windows Mobile devices!
Unified Installer for CABs
Persistent Storage - so that files and settings on your device will not be lost, even if you pull out the battery