I try not to get too excited about potentials like Bell, unless I'm in a deep league or desperate for help. It's times like these when I can overthink things and I end up dropping a player that is more valuable off the 'hope' that Bell produces like a RB2-3. Take a good look at your roster and really think it over to see if it's worth taking a flyer on him. I don't trust Bell one bit, regardless of what Brees says. If you're looking for a one week wonder, he may be your guy.... but don't pick him up thinking that he'll put up PT-esque numbers.
My week 1 rule - always start my studs and/or established backs.
2010 12-team .5PPR
QB - Ryan, Vick
RB - S. Greene, Forte, Stewart, F. Jones, Sproles
WR - Moss, Megatron, NYG Smith, Floyd, M. Williams (TB)
TE - Cooley
D - CIN (week to week)
K - Bironas