Ourlads.com has a list of the average heights, weights, and 40 times of players selected in the 1st round from 2000-06. I've just ran the numbers for guys drafted in Round 1 since 2007, using the numbers listed at NFLDraftScout.com, using their combine measurements. It's interesting to note I think with the COmbine coming up and seeing how pleasures measure up.
You can see Ourlads numbers here:
http://www.ourlads.com/nfldraftavg/Code:
Pos. No. Drafted Avg Ht Avg Wt Avg 40 Max Ht Max Wt Fast 40 Min Ht Max Ht Slow 40
QB 7 6043 237.3 4.85 6064 265 4.73 6021 225 4.93
RR 10 5112 216.9 4.42 6014 235 4.24 5101 197 4.52
OC 1 6037 307.0 5.17 6037 307 5.17 6037 307 5.17
OG 2 6032 310.5 5.18 6037 311 5.16 6026 310 5.19
OT 15 6054 313.7 5.20 6070 332 4.79 6040 306 5.55
WR 12 6012 207.5 4.42 6050 239 4.25 5111 178 4.51
TE 3 6044 253.0 4.61 6057 263 4.51 6021 242 4.80
DE 8 6044 269.4 4.78 6064 296 4.64 6030 249 4.94
DT 9 6026 305.3 5.05 6060 337 4.83 72.5 296 5.29
OLB 10 6023 253.2 4.66 6031 272 4.52 6002 237 4.82
ILB 3 6011 239.3 4.57 6012 242 4.51 6007 234 4.66
DS 5 6002 204.0 4.45 6022 213 4.35 5105 195 4.48
CB 10 5116 196.1 4.41 6014 204 4.29 5102 184 4.51