It was 57,668 donors with an average donation size of $103 each. They feed that information to independent grassroots guys who specialize in stats and post it all in charts like here...
http://paulcash.slact.net/
If you click on the Tea Party 07 link, you can follow the chart there at the bottom to see the average donation sizes throughout the day.
I know a couple of people who "Maxed Out" to the $2300 mark, but most people I know gave around $50 and the majority of people I know, didn't donate at all (Christmas is coming, makes it rough, myself included). I guess, I'm not really getting how you think your scenario (money laundering?) is possible. These were nearly all credit card donations taken online with the exception of phoned in donations.
Last quarter, the FEC report showed that his average donation IIRC, was approximately $40 each. We won't know how the other candidates numbers play out until January... they don't have quite the same level of real-time transparancy. We really have no clue how much they've even raised, much less the number of donors or size of donation. That will come with the FEC report in January.
Not really related to fundraising, but I was checking this out today...
http://blog.compete.com/2007/12/11/...in-huckabee-thompson-if-clicks-equaled-votes/
They also have one that covers DEMs linked on there.