This is based on the hacked smtp server i post the other day, now i'm using it to send free sms.

It only works with Firefox, (Chrome/Opera and IE Crashes)

This wasn't test with any carrier so if you are using a carrier posted below, reply back.
Alltel, AT&T (formerly Cingular), Boost Mobile, Nextel (now Sprint Nextel), T-Mobile, US Cellular, Verizon, Virgin Mobile USA, 7-** Speakout (USA GSM), Airtel (Karnataka, India), Airtel Wireless (Montana, USA), Alaska Communications Systems, Aql, BigRedGiant Mobile Solutions, Bell Mobility & Solo Mobile (Canada), BPL Mobile (Mumbai, India), Cellular One (Dobson), Cingular (Postpaid), Centennial Wireless, Claro (Brasil), Claro (Nicaragua), Comcel (Columbia), Cricket, CTI (Argentina), Emtel (Mauritius), Fido (Canada), General Communications Inc, Globalstar (satellite), Helio, Illinois Valley Cellular, Iridium (satellite), Iusacell (Mexico), Koodo Mobile (Canada), LMT (Latvia), Meteor (Ireland), Mero Mobile (Nepal), MetroPCS, Movistar (Argentina), Mobitel (Sri Lanka), Movistar (Colombia), MTN (South Africa), MTS (Canada), Nextel (United States), Orange Polska (Poland), Personal (Argentina), Bell (Canada), Qwest, Rogers (Canada), SL Interactive (Australia), Sasktel (Canada), Suncom, T-Mobile (Austria), T-Mobile (UK), Telus Mobility (Canada), Thumb Cellular, Tigo (Formerly Ola), Tracfone (prepaid), Unicel, Virgin Mobile (Canada), Vodacom (South Africa), Vodafone (Italy), YCC (Russia), MobiPCS (Hawaii only)