Xml Virtual appliance

Question:

What requirements should one have for an XML virtual appliance
http://www.vmware.com/vmtn/appliances/directory/cat/44

What OS should it run (thinking Ubuntu)
What tools should be configured and set up.
What presets should there be.
What protocols and presets might be useful.

what tools not yet built should there be integrated (these probably
prerolled scripts, for example a script for checking directory of
instances against range of Schema processors etc.)

I figure:

XSV,
Schema Quality Checker,
Sun's multi schema checker
Saxon
Exist

A repository of schemas?





Cheers,
Bryan Rasmussen