Sorry to keep this train wreck going, but just for the record. Mike Reiss seems to think Gaffney's job is in bigger jepordy than Caldwell. Not that Reiss is the be all, end all of all things Patriots or he is going on insider info. But he does probably have a general feel of what Belichick feels about players than we all do.
From his chat:
patfan__Guest_ :With the recent signing of Stallworth, should Gaffney or Caldwell be worried?
Mike_Reiss: I look at the receiving corps and see Stallworth and Welker as locks to make the roster, assuming there are no unexpected off-field speed bumps for Stallworth. Then I see Jackson on PUP to start training camp. So then I have what are likely three more spots and Caldwell, Gaffney, Kelvin Kight, Bam Childress and Jonathan Smith vying for them. And perhaps Troy Brown in that mix. Right now, I'd say that both Caldwell and Gaffney would be safe based on that group. If I had to pick one who was in more jeopardy than the other, it would be Gaffney.
http://www.boston.com/sports/football/patriots/articles/2007/03/12/mike_reiss_patriots_chat/