Trekdude,

If the dent is not affecting the bike, I'd leave it alone. Also, I wouldn't drill a hole in the down tube as it's quite thin (I.E. why it dented in the first place) I was talking about removing the cranks and bb and drilling a hole thru the bb shell into the void of the down tube where they attach to one an other, and pushing it out that way. The bb shell is much thicker than the thin down tube and I wouldn't think it would have a negative affect on it. But if at all possible I'd live with the dent.

Cya,

jr