Since none of you are in my leagues, here's some players who i think are good later-round options:
Redman, RB, Pitt - going as late as 9th round in a lot of leagues, Benson is worth a late rounder since he was picked up by GB, also SD's back-up RB due to Matthews, and hardesty of CLE since Richardson is already dinged up slightly and Cleveland is cursed with no. 1 picks
Matt Ryan or Matt Schaub, can be had 7th-10th in most
Garcon, Moore (now the 2nd WR in NO), Nate Washington can all be had 10th or later right now. Meachem is likely #1 in SD and is going low, VJax is being slept on in TB.
Detroit's kicker can be had in one of the very last rounds
Skins D is going to be better than non-Skins fans think and can be had with your very last pick
I too do not like to draft before at least the 3rd week of preseasons games has passed
I think the best strategy as far as looking at draft site player rankings is to simply use the one that your league will use to draft since people will mostly go off of that come draft time. So if your league uses yahoo, use their ranking, if your league uses ESPN, then use theirs.
One league did theirs early, it's free and just for fun, here's what I got:
QB: RG3, Matt Ryan
HB: MJD, McFadden, Gore, Ryan Williams
WR: Wallace, Meachem, Wayne, Nate Washington, Heyward-Bey