This deal tells me that the Rangers aren't done. My guess is that Mench, Nix or Wilkerson will be gone within the next day or two for pitching. The Cubs love Mench and Wilkerson so a deal involving one or the other for Patterson and a pitcher wouldn't suprise me.
On the other hand, maybe the Astros can grab one of Mench or Wilkerson. That being said...I'm more inclined (and worried) to think the next Ranger deal will involve the Cubs.