Jason Langridge has a fantastic blog, well worth subscribing to if you like your mobiles, but in particular you need to look at this post http://blogs.msdn.com/jasonlan/archive/2007/02/08/windows-mobile-6-what-s-new-and-what-s-cool.aspx. It list just about everything you are going to love about windows mobile 6. (The image to the right is from that site)
Modaco also have a fantastic entry in there news page (http://www.modaco.com/index.php?s=4898c31fe887b3149377fc43e6b3bde8&showtopic=251871)
In particular Im really looking forward to html email, and been able to search exchange for old email without having to re-download it. Internet sharing looks really cool, especially since 3g is getting so much faster (I get Nealy 1Mb in places!)
Hopefully the will bring out an upgrade for my reliably unreliable Vario 2!