TheCounter.com now has a Premium Edition -- just $1.95/month ($9.95/12 months -- charter price). I'm not sure what the traffic cap for that price is, but the cost is 1/5 of where at least one of their competitors (and they seem about average) starts.

05/28/02 update (by Olivier): I don't know when that happened, but they're now priced at $15.95.