Well, it is a bit sad to see their street sign proclaiming their first anniversary and then to have them closed 16 days later, but that's how it happens sometimes. (Though they apparently still have an operation in Florence).
I wrote about this building first in a closing for Cancun / Little Mexico, so the building has been at least three different Mexican restaurants. Loopnet says the place was built in 1980 and is a "Spanish Style" restaurant, so it probably has been Mexican restaurants since it was built. Notice also the fundamental tension in the Loopnet write-up (apparently left over from 2007 or so) between keeping something secret and posting it on the Internet..
I did not yet notice any "for sale" signs on the building last week, but I suppose it will be another Mexican restaurant someday.
(Hat tip to commenter IrmoJeff)
UPDATE 29 Sep 2010: The restaurant is being converted into a Wata Wing -- or maybe not.
Commenter Matt found this PDF of a legal action in Maryland against Wata Wing which seems to basically indicate that while there may be legit WW restaurants, the franchaising operation is pretty much a scam. The work being done on the Mi Teirra building matches the description in the PDF pretty much to a tee, right down to the work on the floors and the note on the door indicating that it was started without getting the proper permits. To me, the oddest thing in the PDF is that apparently none of the people in Maryland investing in WW franchaises ever asked to visit an operating WW, or at least that's the implication I'm getting. The Taco Bell on Knox Abbott seems to be in a similar state of Wata Wing stall-out.