The Droid2 has had the stock VVM application that comes with it ported over to work with Liberty
[APP] Visual Voicemail
Is there anyway I could get someone to port the Droid X one, or has it already been done?
You actually CAN use the one off the market if you edit something in your build.prop I believe. It's as simple as finding the VVM setting and changing a yes to a no if I recall correctly. But I would prefer to use the one that came with the phone.