WindowsPhoneBeta have just dropped us a line to let us know they are all ready to start accepting applications from Windows Phone 7 developers looking to have their apps beta tested.
The new changes in Marketplace allow developers to have a limited number of beta testers (around 100) test an application for up to 3 months with a completely normal handset which does not have to be developer unlocked.
Windows Phone Beta aims to provide a matchmaking service, hooking them up with eager beta testers. The team are also working on an app which would make the beta app catalogue available directly from Windows Phone 7 handsets.
Developers ready to participate can read more at WindowsPhone Beta.com here.