PFT has a list of all the players that will visit or workout with a team and it's updated daily. A new name to the Vikings list is Dontari Poe.
http://profootballtalk.nbcsports.com/2012/03/29/2012-draft-visits-and-workout-tracker/
They must be doing their homework just in case they get a good offer to move down. I know some folks want a DT early (for the record, I don't) and I have to admit that it's intriguing, placing him at the nose and having Ballard the heir apparent behind KWill. It would nicely reinforce the DLine for the future.
Problem is that Poe screams draft bust. Kalil has to be the pick at 3. It's truly a no-brainer at this point. Who knows how the draft will fall. Poe could drop to 35. Or maybe they'll trade up after taking Kalil.