Hmm.... do the transactions have to be confirmed?

Cause if it comes down to the wire, and I put more in at the last minute... does it count?

Also, 12 hours is much to long in my opinion. Other time slots should be available as well, down all the way to 10 minutes. But that's just my opinion.

Sounds fun!
Also, Do you have to be ahead for 12 hours straight, or be ahead at the end of 12 hours?