64 bit Support for Unity?

I have a Win 7 OS 64bit AMD Athlon II x2 255 dual core Processor.
Will there be or is there a way to use the current Unity build for my system?

I am interested in learning from ground up game programming, specifically MMORPG sandbox style based game. I would greatly appreciate any Positive information for furthering my quest to the aforementioned end, Thank you.

Unity works on 64-bit machines, just use the windows 32-bit version.

There is no 64-bit version but that is not needed for development for 64-bit machines since 64-bit Windows can also run 32-bit software.