I think for a 14 team league, you have enough power. Between Tex, Bonds, Mora, and Hafner, you have like 145 hr/420rbi and probably 400 runs. You have enough speed and 35 sb on your bench in Cameron and Barfield (who is doing well this Spring). If you want to upgrade, your best trading chip is Javy Lopez. Not too many people are savy on Willingham, but I think he'll put up similar power numbers.
Initially, I thought trade Doug Davis for a Burrell or Huff, but since this is roto, you'll need Davis' strikeouts especially since your only other strikeout artist is Pedro and your closers. If you can get a real OF stud for Lidge or Wagner and Devine is available on the WW (he'll be Atlanta's closer very soon), do that. I dunno, what's a good deal for your closers though. Maybe Dunn? Haven't really done much trading in closers, so get another opinion on that...
Anyway, if you have a sec: