Microsoft has released Beta 2 of their .NET framework 2.0 for everyone
to download. I'm a bit shaky at what .NET is specifically, but according to the
MsMobiles article ".NET CF roughly corresponds to wireless Java but offers much more libraries, faster software development and now also better access to features of the underlying mobile operating system."
In other words, it allows for a lot of more functionality for our already awesome PDA's (and other operating systems)! I anticipate that a lot of programs will be taking advantage of the improved capabilities of this.