Windows Mobile 6.5 build 28002 was opened up by the guys over at XDA Developers. The guys over there are currently calling the build 6.5.3. A feature spotted in the build was a more refined virtual keyboard that aims to be more finger friendly unlike the older stylus sized keys of the past.
In the past, smartphone creators such as HTC have built in new virtual keyboards in to their own builds, but now it seems MS might be looking to improve the keyboards themselves.
The post on XDA can be found here that mentions the keyboard was pulled from a DLL file which can actually be customised. A weird thing to note is that the backspace key on a couple of the layouts is backwards for some reason.
Via: PocketNow