We're currently seeing lots of discussions on our forums (like here or here) and on IRC about console/hardware bans again, so it seems Microsoft is busy with a new Xbox LIVE console (not gamertag) ban wave atm.
Right now we don't have a lot of details, except it doesn't seem to be linked to any particular FW version or drive model, as users with all type of FWs and drives report bans, while others with the same configuration still seem fine.
Report your status in the thread below.
More details soon ...