I will bet 500 karma that a funny picture thread will appear on Less Wrong within one year. If anyone is interested in the bet, we can better define terms.
Right now the LW software doesn't support karma transfers. Until it does and we can develop a more robust prediction market, let's just record the karma transfers on the wiki page that already exists for this purpose.
I will also give 100 karma to anyone that donates $10 to the SIAI before the current fundraising campaign is over.
10,000 karma for the first person with a karma transfer source code patch?
An interesting note here that is hinted in earlier comments but not suggested outright...
Some folks seem to use karma as some sort of proxy for Rationality Belt Level... a betting system using karma would more tightly bind to this idea, as we generally see making good bets as a sign of rationality (all else equal).