So this will be an ongoing post, updated and reposted as necessary, in which we try to figure out potential matches for the Astros as July turns into 2012 and beyond. And yes, that's a Christina Aguilera reference. There will be no speculation in this post by us, all "Wants/Needs" are sourced.
Update: MLBTR has a list of contender needs.
7/18: Lead-off hitting CF
7/18: SP, OF.
7/16: SP, 3B