Blackjack’s Business Cards Collector:
Abduzeedo
Cardobserver
Daily Poetics
markdvl
Printclick
designrfix
Zeixs (book)
Business Card Design
Graphic Fetish
BusinessCards24
thebusinesscarder
webdesignledger
thoughtmechanics
Business Card Design
Friends & Respect
Bellucci
Lowlife
Veaux
Behance
Daniele Canuti
Deviantart
Extraverage