The Wall Street Journal reports that the revised Republican National Convention schedule contains “a vague reference to a mystery speaker.”

A mystery? Oooh. The Twitter Bloodhound Gang is all over this one. Twitterers used two hashtags to investigate the unnamed speaker’s secret identity: #RNC2012MysterySpeaker and #GOPMysterySpeaker.

Drudge suggests Sarah Palin.

But some are doubtful.

Herman Cain is teasing … Herman Cain.

Perhaps it’s Hologram Reagan?

Could the trail of clues lead to … Joe Biden? Unlikely. But we can hope, right?

Other guesses:

Oh boy:

Bigger “oh boy”:

Maybe the mystery speaker loves lamp?

Some speakers may prove harder to get than others.

Too soon, man. Too soon.

If there’s one certainty in life, it’s this: