Over at the WM Team Blog, msaffitz writes up the details on a great new tool for developers (and maybe power users): the Windows Mobile API Usage Tool. The basic idea is that it will scan a .cab file and then spit out all the APIs (the tools that programs use to interact with the core WM operating system) that program uses. Why is this useful? Well, not all APIs are created equal -- some are more efficient, some are better supported, and some are scheduled for the chopping block in future versions of Windows Mobile.
Definitely a must-download for any WM developer looking to keep their app up-to-date and potentially fun and interesting for enterprising power users who want to figure out which apps are doing what on their devices.