The feline is well and truly out of the burlap now:

Texas Gov. Rick Perry will make “a definitive announcement that he is in the 2012 race for the presidency Saturday,” aides told Fox News.

The language is significant. For several days the Perry camp has said he would signal his intentions and announce later.

Perry’s Saturday stops are in South Carolina and New Hampshire, but given South Carolina’s historic impact on GOP nominations, I’d say the official announcement will probably be made there.