Finally the project is finished. I developed the transliterator in javascript to parse the english keyboard input in bangla unicode characters phonetically.
The script is released under LGPL, so anyone can use it.
You can browse the online version of this script at
http://www.phpxperts.com/phonetic/example.html
Or you can browse the subversion repository of code at
http://phoneticbangla.googlecode.com/svn/trunk/
Lets evaluate.