According to answer bournty.blogspot.com
If you get the President to answer the question (before Nov. 1st, 2004), you'll get another $1000.00 from me (again, proof is needed). If you get him to answer in a news media covered forum, and his answer gets mentioned by ANY of the major news networks during primetime (for this, I consider major to be any of the big 4, ABC, NBC, CBS or Fox), you'll get an additional $4000.00. One more thing. We already know he's been arrested at least ONCE and fined $150 and temporary suspension driving privileges for driving under the influence of alcohol (Wikipedia). IF HE GIVES AN ANSWER OTHER THAN "ONLY ONCE" I'LL PITCH IN ANOTHER $1000.00!
Sounds like an interesting challenge. I suppose though, that "proof" will be hard gained, if only because 1. He screens all his "town halls" 2. it's not likely that the type of person whom will read this will actually be in those "town Halls" 3. the Kind of person who DOES care enough about Bush's past indescresions will be at a camejo/nader/kerry meeting instead.