Business Card apps / iPhone

http://mashable.com/2009/05/09/iphone-business-card-apps/

http://www.techcrunch.com/2008/10/14/nameo-single-button-business-card-replacement-for-the-iphone/

http://www.mobilemarketer.com/cms/news/software-technology/2345.html

Location Based Social Networking / iPhone

List of Location based social networking

http://bdnooz.com/lbsn-location-based-social-networking-links/

8 cool Location based social networking

http://www.crn.com/networking/208802663;jsessionid=YVOFLVIWTXXHDQE1GHPSKHWATMY32JVN

Google tries location-based social networking with Latitude

http://arstechnica.com/web/news/2009/02/google-tries-location-based-social-networking-with-latitude.ars

http://www.techcrunch.com/2008/09/28/the-state-of-location-based-social-networking-on-the-iphone/

http://www.abiresearch.com/press/1204-Location-based+Mobile+Social+Networking+Will+Generate+Global+Revenues+of+$3.3+Billion+by+2013

Near Field Communication

GETYOO

http://getyoo.com/

Poken

http://www.doyoupoken.com/web/guest

ink-ling

http://www.shimpeiokumura.com/userexperience.html

Brightkite

http://blog.brightkite.com/

ZKOUT (its dating site actually:)

http://www.zkout.com/matches/

http://www.skout.com/flash/iphoneapp.jsp