Microsoft's response, as reported elsewhere (pocketnow.com for one) was rather mild. Sort of "gee we wish people wouldn't do that because it could void the warranty and do other bad stuff too." Sounds like the right approach. I certainly admire the work that the gang at xda and other places can do but as much as I've been tempted I've never installed one of their ROMs or any of their apps on a Windows Mobile device. I was tempted because there was real innovation happening there and nothing that similarly caught my attention in the offical Windows Mobile marketplace. The unofficial channels will have to work harder to compete with the WP marketplace. A ringtone app isn't enough.