Google has published the fully open source version of the Linux-based Android operating system for mobile phones. Java's the primary development platform. There's just one actual phone from T-mobile at the moment, and it's not as well designed as the iPhone, but more are on the way. The open development model of the Android should make it the phone of choice for anyone who wants to install their own software. The Android will also have a much larger selection of form factors, plans, and service providers. It remains to be seen whether any of these will acheve the polish and ease-of-use Apple is known for. Nonetheless it's hard to see how the iPhone can possibly keep pace with a truly open phone platform unless they themselves open up the iPhone to all comers.