Google Wallet is only officially available on one phone — the Nexus S 4G for Sprint — but if you have a Nexus S for T-Mobile or AT&T and an itch for rooting, you can get it with a simple hack. XDA Developers member got2best posted a downloadable zip file, compatible with a bunch of custom Android 2.3 ROMs, that brings all the Google Wallet goodness, including the $10 free credit for new users. The hack is Nexus S-only — other NFC-enabled phones will have to wait a little longer — but at least you can get Google's impressive tap-to-pay software on more than one carrier now.