I have to say that this looks like a fairly good idea. A mobile phone that uses yours or any w-ifi connection and then cell tower for backup. Looks like all spots are currently filled, but you can leave email for notification when more spots are open.
More here,
republic wireless
SeaSonic M12II 620W, ASUS M4A87TD EVO AM3 AMD 870, AMD Phenom II X4 925 Deneb 2.8GHz, Crucial 8GB (4 x 2GB) DDR3 1333, SAPPHIRE Radeon HD 6850, Kingston HyperX 120G 120GB Solid State Boot Drive, WD Caviar 1 TB Storage Drive, LG DVD-RW, Samsung SyncMaster 226bw 21" LCD, Windows 7 Home Premium 64bit