Back at Mobile World Congress in February, Steve Ballmer announced Windows Mobile 6.5 and a set of complementary Services – MyPhone and Windows Marketplace for Mobile.

The Marketplace is now open for Developer registration – this enables you to register with the Marketplace as a developer, and start developing applications to be distributed via Marketplace to Windows Mobile users worldwide.

So the steps you need to take are:

1. Register at (you’ll need USD$99 and a LiveID)

2. Get the information & tools to develop for Windows Mobile from

3. Get developing your innovative applications