Here is a list of domains per parking company:

Sedo ~ 2,037,302
DomainSponsor.com~ 1,637,974
Fabulous.com ~ 1,311,439
Godaddy.com (paid parking service) ~974,173 
Parked.com 812,300
NameDrive.com ~ 531,973
RevenueDirect.com~ 297,146
ParkingSpa.com~ 132,104
ActiveAudience.com ~ 122,314
TrafficZ.com ~ 346,767
WhyPark.com ~ 53,458

 
Some of the largest amount of "parked" domain names, are domains at Registrars that people register and never change the name servers. Since most registrars use the same dns for hosting/new registrations like […]

This may seem kind of funny to some and pretty odd to other’s, but I have no reasoning behind it, other then it works for me when I do it.
It always seems that when I first park a domain name with a parking service, it always does it’s best the first 5 days it’s with the […]

If you read my blog often, then you know what these domain stats are all about. These kind of stats are not normally posted and can be pretty interesting.
These stats are from yesterday, 2-15-2008
SnapNames.com gained 28,169 new domain names to their auction service. These are 99% from drop catches from Pending Delete domain names.
The parking company […]