A couple of AirTran additions which they put out in a PR item today, although they were bookable awhile already:

MKE-PHX returns in December 1x, with the second red-eye flight operating right around Christmas and then again for mid-March through early May.

MKE-TPA gets a morning flight starting March 8th. The release makes it seem like MKE-TPA doesn't start until 3/8, but it does appear the existig afternoon flight operates prior to that.

On a separate but related note, I posted speculation on the Southwest post-merger MKE hub on the AirTran board. Probably of interest to some here, but more approriate on that board.