Google's SMS search is simply not returning results anymore. I am not sure how many people this is impacting, i.e. I have no idea how many people use Google SMS to search on their phones, but some have noticed it.
For example, here is me sending a text to 466453 and Google returning no results for either "Lakers" or "RustyBrick."
A Google Mobile Help thread has confirmation from a Google representative, Bret, that there is an issue. Bret from the Google Mobile team said:
Thanks for bringing this to our attention. I'm looking into the issue and I'll reply to this thread with any updates.
The issue was first reported last night.
Forum discussion at Google Mobile Help.
Update: It was still not working at 6:30am (EST) on 1/9, but at about 10:30am (EST), it started working again.