My favorite is TheHuddleReport.com and it is really a combination of authors. Aaron Freeman works the Teams' Needs angle of the draft. Fred Jones does a probability thing considering the top 3 choices for a team. Robby Esch sort of compiles all the outside data with his own grades. However, the main reason I like it is because of Drew Boylhart. He is very opinionated and is the voice of the player profiles much like Mayock, Kiper, McShay, etc. You might not agree with everything he says, but at least he's willing to say that the 1st round consensus guy is going to be a BUST if somebody drafts him like all the experts are predicting. It only costs $10 per year.
http://www.thehuddlereport.com/Free/...ardstats.shtml
These are their stats in terms of accuracy. Again, the board changes until draft day, so today's board may not be the one to go by. However, it gives a pretty decent approximation.