Try to check the following:
Code:
delicious.com
slashdot.org
digg.com
reddit.com
propeller.com
connotea.org
folkd.com
tumblr.com
mixx.com
furl.net
multiply.com
blinklist.com
mister-wong.ru
pipe.bg
smi2.ru
news2.ru
sphinn.com
clipclip.org
searchles.com
indianpad.com
spurl.net