The first Republican debate for the 2012 race is set to take place on for May 2, 2010, but that doesn't guarantee that candidates will make their announcements before then. Huckabee has already said he doesn't think he'll be attending the spring debates. Indiana Gov. Mitch Daniels (R) and Former House Speaker Newt Gingrich (R-Ga.) have also expressed reluctance to participating in early forums.
Another factor is the number of potential Republican candidates who
are employed by Fox News. Announced candidates who work for free media
outlets like Fox News would be subject to prohibitive laws.
With all this in mind, 2012 official candidacies could be a long ways off but that isn't unexpected. It is entirely possible that formal announcements won't be complete till Sept.