I've been using PPL for over a year now. I use C#/VS2005 for my day job but I've found PPL much better suited for WM5 and PPC development. My SereneScreen Phone Edition application was written in this language. I think one of the most impressive things is the level of responsiveness the developer and the user community he has encouraged to develop around the product has become. PPL seems to have a bright future - IMHO...
http://beerysbit.blogspot.com/