http://bluemason.net It's a search engine. Searches the best free streaming porn sites on the web. Currently without the option to add a url but one is soon to come.
This is sorta spam ...it's a custom google search (co-op with adsense) so you can place your own google ads on a search engine and define what sites it searches. It's basically google only it adds the words "porn" or "sex" or "xxx" to your keyword.
I'm guessing you don't know a lot about co-op. That is not how it works. YOU define what sites it searches, has nothing to do with adding keywords to a google search. There are no ads on the site and it will soon give the option to submit a site. Google is the best search engine around, why not use their free utility to power your site? This is no different from any other search engine. It works and that is all that matters. You don't realize it but a lot of other search engines posted on here use Google but they do a good job of hiding it.
Besides it being Google, I'd suggest maybe styling it a bit more maybe have a logo that fits the domain (a blue construction worker?) and make the sites it searches (pornotube, etc) smaller. And the iframe should be a bit bigger so the results are viewable (use a % rather then pixels, say 65%)
It's google custom search engine. You define a list of sites to be searched and when you make a query will search only those sites, but I think the only option to add an url is to make it manualy or you could use google API.
there is a site at streamengine.tv which has streaming video search by category of top sites, including adult
There is as well http://porn-stream.blogspot.com/ which is a very complete site, updated daily which offers free porn videos to watch or to download for free.