IMO Booker will be gone soon.
I think it's pointless to keep the same corps of receivers when the offense has not excelled with this same group the past 3 seasons.
Keep Chambers, maybe move Derek Hagan to #2, and draft a rookie receiver in later rounds [Mike Walker please, thanks].
If you checked out the San Diego Chargers' depth chart, you would see the Cam Cameran's offense does not have much of a passing game. Eric Parker, San Diego's most productive wide receiver in 2006, only recorded a whopping 659 yards receiving:
http://www.nfl.com/teams/depthcharts/SD
I think we will be fine without Booker. Besides, his legs are declining. He has slipped so many times last season, it was getting pathetic.