Unlimited backlinks from these google query footprints

Use these footprints,you can find unlimited backlinks source:
pligg site footprints
“Powered by Pligg”
inurl:”Pligg beta”
inurl:story.php inanchor:upcoming
allintitle:store share and tag your favorite links
edu forums sites,gov forums sites
site:edu inurl:login (Create an account)
site:edu “powered by vbulletin”
inurl:.edu/phpbb2
inurl:.edu/ (Powered by Invision Power Board)
site:edu “powered by SMF”
For competitor backlinks yahoo lookup:
linkdomain:competitor.com -site:competitor.com
cbox sites:
allintext:[get a cbox]
Oggix.com sites : intext:”by. oggix.com”
If you know any other footprints,please do share on this thread to contribute.
I think we still need :
Top comments blog footprints
Commentluv blog footrpints
nofollow free blog footprints
keywordluv blog footprints.