By the time I voted it didn't matter, but I voted for Franks myself. Not only did Franks win OROY, he also led all OL in regular All Pro votes so he definitely deserves the honors. If I was going to vote for a QB for OROY, it would have been Emory Howard, as he had a much better TD/INT ratio.
If Lawson had like 17 or 18 INT, it's probably a much closer vote, but when you have an average of 2+ turnovers a game, the voting results aren't surprising to me.