There is evidence that Rose bet on baseball as a player, it came out last summer: http://espn.go.com/espn/otl/story/_/id/13114874/notebook-obtained-lines-shows-pete-rose-bet-baseball-player-1986
Personally, I voted no. Pete broke the #1 rule of baseball. That is, you do not gamble on the game. Ever. Gambling nearly destroyed the game in the early 1900's. As a huge baseball fan, I don't want to see that happen again. And Besides, Pete has had every chance to reform himself and get off the banned list. He has nobody to blame but himself.
Lets also not forget that Pete's accomplishments are in the HoF. His jersey, bat, helmet, etc are there commemorating the day he become the NL hit leader. All he doesn't have is a plaque that the HoF'ers get.