After working for more than 7 days, I successfully introduced Bangla Forum Hosting Service where everything is in Bangla (Bengali). The user interface, input methods are in Bangla. There are two typing methods e.g. Unijoy and Phonetic. Both system is developed by Hasin Hayder.
Oh, feeling bore to type anymore. Please take a look http://www.bd-host.com/content/view/41/1/ for details.