Wow, that's cool!

One thing to note, though, it does not play SFZ, despite its name. I think the freebie (at least the one with Sonar) does play them. But, hey, there are a lot of great soundfonts out there so that should be a nice addition!

This reminds me of another former payware, now freebie that I found and forgot to mention. It's an amp sim and it's not half bad, although the interface is a little busy: http://www.greenmachine.pwuq.net/Wurr_Audio_Engineering/Home.html