RG's team at Vakow have enabled posting on Twitted via Vakow.
Da 1 million $ reason to use this service,
Coz its cheaper because vakow don't use a shortcode like Twitter. ( Vakow SMS = 0.50- 1 Rs, Premium SMS 3 bucks)
4 more details check here http://www.vakow.com/settings/twitter/
If you are wondering WTF is Twitter or Vakow, Pls Wiki or Google it :)