Domain Parking is when you take a domain that you own and forward its nameservers to a parking provider and they fill up your site with a template + advertisements. Sort of like swvt.com. There are different providers, and thus, different services offered. From different templates to different advertising feeds... there might be a difference in revenue. You make money per click on an advertisement and have nothing to do with the site after parking it... unless you want to customize the template and/or choose different keywords. For a list of some parking providers, check out http://www.fka200.com/domain-parking
i really like your site FKA. op - i keep a list here > http://www.domainloot.com/domainparking.html best of luck OP.
Thanks DomainLoot. Your site just went under my "Services" on my site. As for average click... it's the same as AdSense. Depends on the niche.