Windows Phone 7 is out and it is just a matter of time to release a jailbreak solutions for WP7. Already developers has uncovered some vital information about the device and the software. An Australian developer Chris Walsh was successful to run native” unmanaged code on a retail Windows Phone 7 device.
He noticed the funky code that Samsung had created to set the Network properties of a Windows Phone 7 handset. If the DLL called Microsoft.Phone.InteropServices is changed it will enable COM access.
Yes this is all in developers point of view but everyone else need a simple and smart piece of software that can jailbreak the WP7 to run unapproved apps. However, it will take time as still you do not really required to jail break or root your phone as there are not many application.