GoDaddy (Cash Parking) is a one-click PPC parking service by probably the largest domain registrar. GoDaddy has two parking plans to choose from: basic and premium. Basic plan costs $3.99/month and allows users to earn 60% of the advertising revenue. Premium plan costs $9.99/month and allows users to earn 80% of the advertising revenue.
Users can define keywords and categories for the domains, upload custom images and define colors of templates. Template designs are quite simple.
Payment options is quite poor: check and direct deposit for US customers (once a month, hold of 45 days), and only check for international customers (once a quarter (!), hold of 45 days).
GoDaddy Cash Parking nameservers are as follows: ns01.cashparking.com, ns02.cashparking.com.
Approximate number of parked domains is 1.23M (August 2011).
Screenshots of domains parked with GoDaddy:


