WWW- The five fastest growing web sites in December 2007 basically boil down to a few key markets, according to Compete.com*: porn, porn and more porn. (That’s only a slight exaggeration.)

RedTube.com a fairly new NSFW site, was the top web gainer for the month, attracting more than 4 million visitors in December; iamfreetonight.com, a free dating site, was the second fastest growing site, followed by podshow.com, a digital media site; YouPorn.com (the name says it all); and TechCrunch, a technology news site, which was ranked the fifth fastest growing site for the month.

The lesson here? The web is still dominated by lonely, horny tech geeks.