New App for Nexus S users to try. Please read the description before trying it!!!
https://market.android.com/details?id=com.mobdev.nfc.switcher
And try this one too that is really nice.
https://market.android.com/details?id=at.friendsradar.mc
https://market.android.com/details?id=com.mobdev.nfc.switcher
And try this one too that is really nice.
https://market.android.com/details?id=at.friendsradar.mc