Was expecting to release Lohit Bengali around June 2014 but it took more time due to priorities of some other work including glibc.
Finally work with Shilpa last couple of week last week and completed this milestone. :)
Lohit Bengali 2.91.0 has number of improvements over earlier release.
TTF size is reduced from 140K to 128K (still some improvement possible by removing halant form which can easily formed by GPOS )
Standard compliance is one more thing happened with this release. Unicode, OpenType spec. If we are still missing something do point us to particular document.
Looking forward for more testing and more improvement in Bengali.
Do read lohit-devel email for more information.