I've been playing with it and so far I'm impressed.  You still have to learn the individual iPhone API calls and adjust to the new environment but once you get past that it's actually quite easy to use.<p>FYI: This e-book has helped a lot: <a href="http://www.wrox.com/WileyCDA/WroxTitle/Building-iPhone-and-iPod-touch-Applications-for-the-NET-C-Developer-with-MonoTouch.productCd-0470590734.html" rel="nofollow">http://www.wrox.com/WileyCDA/WroxTitle/Building-iPhone-and-i...</a>