What kind of trouble were you having with NAnt and 2.0? I've had nant-0.85rc3 doing 2.0-framework builds since early '06 for a client of mine. I recall having to fiddle with the bin\nant.exe.config to cobble up a 2.0 framework section, but it was pretty much a copy/paste job, and replacing the 1.1.4322 strings with 2.0.50727 strings. Hope this helps.