I had come across https://indiagames.com in Sept. 2006.
I had heard of indiagames before as it is the biggest mobile gaming company in India. Then they had recently released their games on demand service. I had subscribed to it and I was surprised to find games like Tomb raider legend, diner dash, hitman blood money, war rock, igi2 covert strike, etc. The usability is really good. You just have to click on the play button and the game downloads, and then after that you can even play the game when the download is 50% complete.
It is very cheap, at about Rs 199 per month and they have tied up with several ISPs such as MTNL Triband, TATA Indicom, YOU, BSNL, Airtel broadband etc.
They have a points system wherein you play for 1 hour and you get 60 points. Then when you get about 35000 points for eg you get a nokia N73 and 50000 points you get a gaming laptop and 50000 points gets you a ps3. Its too cool. You should really check out https://indiagames.com
As for their mobile games, they are also very good, though they should expand their range for Sony Ericsson. Their best game is Office Games. They have games like Sims 2 also for the mobile phone.