So, leechaotang, forget it - unless you're a cracker and you find a 0-day exploit for the VM that you're using.
Or if you want to hear about crazy ideas you could e.g. copy in the dom0, using a cronjob, the whole memory content to a file and access it via a share from domU or some more direct way again using softlinks, pipes, tubes or whatever... .
Don't wanna think about it - I'll leave the dark arts of memory access through VMs to you so that you have a chance of becoming famous (please mention sundialsvcs and Pearlseattle when you're interviewed by Slashdot)