UPDATE - 3/17@11:16AM: I'm also hearing that Far Cry ringtones are now available for Verizon Wireless and T-Mobile users.
Rush.com was just recenlty updated with info regarding their new US mobile list. Simply text RUSH to 50505 to sign up for the RUSH mobile alert list. You can also send them your zip code to receive area-specific alerts. Very cool idea. Thanks to reader Arthur for the heads up.