The joke dot-com du jour (no, not Tagged, this one knows it's a joke) is isolatr, which promises to hide you from other people. Best gag is the "getting lucky" error page.

Metroblogging king Sean Bonner made it. Sez Sean: "Of course I did. Anything hilarious on the web most likely originated with me." Is he revealing "not at SXSW" loneliness? Aw, hell no.

isolatr [beta]
Isolatr launches [Sean Bonner]