Yes.
XNA Game Studio 3.1 is here:
Submitting 3.1 Games
XNA Game Studio 3.1 games can be submitted to Xbox LIVE Community Games starting late July. Please note!
Currently, if Premium Creators want to submit or service their game
to Playtest and/or Peer Review, those games must remain XNA Game Studio
3.0 projects. In late July, you can submit games upgraded or created as
3.1 projects to playtest and/or Peer Review, but they will not go live
to consumers until we are able to upgrade Xbox LIVE Community Games
Marketplace later this Summer.
You'll either have to wait or downgrade your project to 3.0 (not easy but possible, unless you're using the new 3.1 features like Avatars).
"No programmer can pick up a TV remote without thinking what it would take to add a stun gun. [...] Their motto is 'if it ain't broke, it doesn't have enough features yet'" - Scott Adams,
The Dilbert PrincipleThe signature that was too big for the 512 char limit
