As we had told you that Microsoft will release Final Or RTM version of IE9 on 14th March 2011.Microsoft has finalized the RTM and has build number 9.00.8112.16421.110308-0330.
As from build number you can see that the copy was finalized on 8th March 2011 at 3:30 AM.
We had also got a mail from our reader containing apic who had got leaked or something like that, copy of IE9 and here is the pic :-
Sorry we are unable to tell whether this pic is Genuine or not, but it seems Genuine as you can see the build number on it.