Something I mentioned in another thread and that I should have mentioned here, earlier: Bush hasn't won the election, yet.
Kerry's concession isn't legally binding, the electoral college has not yet presented it's votes to congress, and the joint session hasn't certified anything. This doesn't happen until Dec. 18th.
As it stands, Bush has not been elected yet, and the members of the electoral college are within their rights to vote however they see fit. It just so happens they historically cast their votes to reflect the way their state voting totals came out, but if enough proof of election shenanigans can be brought to light? There was a Republican in Pennsylvania that said weeks before the election that he wouldn't cast his vote for Bush, regardless of the popular vote results.
Things could still get interesting.