Microsoft invites PS3 jailbreak dev to take a crack at Windows Phone 7
The invitation has been handed out, with WP7 lead Brandon Watson offering to ship Hotz a device so that he can give it a go. Microsoft, of course, has said that it fully supports "official homebrew" development for WP7 and met recently with the Chevron WP7 team to discuss community and development-related issues.
The exploit used by Chevron WP7 is due to be patched in the January update for Windows Phone 7, so GeoHot will need to look elsewhere. Still, he's done it twice before, so we wouldn't be at all surprised if he can do it again.