Scott Brown's campaign has exceeded its original goal of $500,000 for its "moneybomb" today; as of 5 EST, it's at $626,000 and climbing. Around 3:45 EST, it was at $486,000. That's about $100,000 an hour! This could top out at a very big number.
UPDATE: Around 9:40 EST, Brown's passed the $1 million mark.