Well, not we finally have confirmed reports that Google SMS search has been fixed and is working.
A Google representative, Bret, said Google has "recently made some changes on our end to address this issue." Now, if you want to get sports scores via Google SMS search, it should now work. It only took about 20 days to get working again, but it is working according to many users in the thread.
I am personally unable to test it now, being that I am in Israel right now on vacation.
Forum discussion at Google Mobile Help.