A good site to check out is antsports.com. They run live mock drafts constantly. You can look up the average draft position each player has been selected at in specific types of drafts. If you are in a ten team league, look up the first fifty players taken in the last 20 or 30 mock drafts. That will give you a good idea.
But keep in mind that if a player signs up and then doesn't participate, it skews the draft toward the computers pre-rankings. Also, they have some players like William Green, Koren Robinson, Amani Toomer, and Donald Driver so far down on their lists, sometimes players overlook them so they go far too late.
It is, however, a good tool to use.
It's time to roll the dice!