I sent the FRC FMS format to FIRST today, probably come out in the Team Update tomorrow.
The account is
http://twitter.com/frcfms
Regionals will be identified by the hash format #frc(event code) the event codes will be in the update.
EDIT: Test feeds are still going up now through start of matches Thursday, so you can start incorporating them if you'd like. This is an automated service done by FMS, right now it'll only be on match commit, after we do some engineering collection on twitter performance, we have the capabiltiy to feed it semi-real-time during a match.