Here is non-valued decision by WIPO against the case file by TATA sons to get ownership the domain OKtatabyebye.com. please share your opinions or vote at http://www.oktatabyebye.com/support-us/Appeal.aspx
The actual decision. What kind of vote only gives you one option? http://www.wipo.int/amc/en/domains/decisions/html/2009/d2009-0646.html You really don't want to get into a trademark lawsuit with a 140 year old company that has 350,000 employees and $62.5 billion in revenue last year. They will bury you in legal fees regardless of whether or not you have a good argument.
Good luck with the lawsuit...if indeed you'll push through with it. Unfortunately that's the only thing that can possibly retrieve the domain name.
I'll vote if you can show your 50 billion dollar bank roll. If you can't you don't have a hope in hell... unless you can convince Bill Gates to back you.