64 bit slate VM images

I just upgraded my computer to a dual core amd64 machine. I'd like to
use this machine to work on slate, but I can't find any 64 bit images
and I'm not sure how I could use the initial lisp sources to generate
a new kernel image. Anyone have any ideas or experience here?

I'd like to stay away from installing any 32 bit programs on this
computer. Thanks.