One trade already done:
Detroit trades undisclosed pick to Jacksonville for WR Mike Thomas. Pick will be a 5th as Lions already traded their 4th to get LB Tahir Whitehead. Could be a 6th I guess.
Rumors I can validate:
Detroit and Washington have both called Houston about reserve safety/former starter Troy Nolan
The Rams are getting calls for Steven Jackson and their corner depth. Green Bay, New York Jets, Tennessee, and Cincinnati have called about Jackson. Packers fans shouldn't get their hopes up

Kansas City called Carolina about Steve Smith with what (if it's the real offer) had to be a real tempting offer. 2nd next year and conditional 14 pick.
The Chiefs are getting calls for Dwayne Bowe and Dexter McCluster. Houston has called about both. The Lions called about Bowe but didn't like the price.
Rumors I cannot validate:
Tebow to the Jaguars
Mark Ingram to the Packers. You're going to hear a lot about the New Orleans RBs, all of them. I can tell you Ingram is the least likely to move. If a team has an extra RB with a healthy knee, the Packers and Bengals are interested.
Matt Flynn to Jacksonville or San Diego.