Just a few links:

http://www.wetset.net/
http://www.xtube.com/
http://members.easyshag.com/femaledesperation/main.html
http://beju2000.free.fr/

A french site for piss and poop friends
http://www.pipiculotte.net/

For Diaperlover
http://www.diaperspace.com/
http://www.dprtube.com/

A russian pee site
http://pac2006pac.paccident.com/

Something for boys
http://wetpantsfun.com