I didn't enter, but I thought I'd show how well i did.
2007 New York Giants
Leon Hall -CB- Michigan (GM: 16th overall, NFL: 18th overall) -2
Adam Carriker -DT- Nebraska (GM: 19th overall, NFL: 13th overall) +6
Darrelle Revis -CB- Pittsburgh (GM: 23rd overall, NFL: 14th overall) +9
Joe Staley –LT- Central Michigan (GM: 40th overall, NFL: 28th overall) +12
Quincy Black –OLB– New Mexico (GM: 97th overall, NFL: 68th overall) +29
Chris Henry –RB- Arizona (GM: 103rd overall, NFL: 50th overall) +53
Laurent Robinson –WR– Illinois St (GM: 110th overall, NFL: 75th overall) +35
Gijon Robinson –FB– Missouri Western (GM: 144th overall, NFL: undrafted) -122
So overall I was +20, and at 8 players that's an average of +2.5 per pick.