If we stay at #22, which is not a given, I still think Dwayne Jarrett is the guy. If he is gone then Meachem or Bowe.
I really don't believe that Ginn is on our radar at #22. He is not a starting NFL WR prospect and would be a situational player: STs and 3rd WR, which is not what you spend a 1st round pick on IMO. To my knowledge there have been no reports of the Cowboys showing any interest in Ginn at all, while the other 3 each have had at least one report that we were interested.
Jarrett, Meachem, and Bowe are all starter material but IMO Jarrett is the most ready to step in and play (despite what Keyshawn said). I also believe that Glenn will play a few more years for us while Owens is gone after this season. Jarrett would make the best compliment across from Glenn although either Meachem or Bowe could fill that role as well with their size but not quite as well. Jarrett has played opposite a Glenn-clone in Steve Smith for a couple of years now at USC and is a good route runner.
I would not be disappointed at all if we took Meachem or Bowe but I would be shocked if we took Ginn.
OG Justin Blalock is another guy I think we might be targeting if we can trade down a few spots.