I hope some mobile company in Indonesia do that. In Indonesia the only mobile unlimited is via "XL" (operator name). It offer GPRS (yes not typo, GPRS) unlimited @ 5,9 KB/s (in 2G Town, with 2G HP) OR 7,1 KBPS (GPRS over 3G Town / City, with 3G Cellphone) at 290.000 IDR or about 15 GDB. If you want download new DVD linux, think how long you will get it? If you became Microsoft beta tester (which each month rolling out new CTP build) think how long will you get it. 
In My town Mojokerto, there only 1 (read: ONE) 3G (read: Third Generation not 3,5 G) singnal, and it not "XL". 
The worst think of communication in Indonesia is it's lack of new technology. CDMA 2000 1X EV-DO that I read in 2003 till now there isn't near anyware (5 years, read FIVE YEARS). Logically everythink is cheaper here, except car and INTERNET.