Palin is set to have a two hour infomercial about her leadership released in theaters next month. If she were to announce her candidacy at this point, then the movie could be viewed as some kind of illegal campaign contribution and it would open the floodgates for litigation.
She will announce in late August or early September after the theater run and before the DVD release.
In the meantime, the other candidates can embarrass themselves by going to debates and diminishing their stature by answering such important questions as "deep dish or regular crust".
I saw those questions as an attempted set up.
I think most of us wanted to hear somebody say, "We're in several wars, only two of which actually concern us, we're broke financially and the @#%&* in WH is giving away money to our enemies; and you're asking deep dish or regular crust?!"
Anyone who did that would immediately be labeled as humorless, harsh and unfriendly at best. Doesn't work and play well with others.
Maybe they could say wars, broke, helping enemies, "...but I guess we do need a little comedic relief from the wreckage of our country" and then give a witty answer and follow up with "Does that help you know me better?". IIRC that was the rationale for the dumb-ass questions.