Well... my tool doesn't win hands-down against anything as far as the big public is concerned, since it isn't actually available! Also, I really don't want to go up against VSL -- I wrote this as a tool for myself, as it seemed clear that it would be possible to do. I've had ideas to do something like this since before I even knew about VSL, and I finallly managed to build something that works.
There are many great things about the Vienna Instruments (a high degree of flexibility of user-configuration, for one), and I seriously doubt that I can get my tool to perform at as high a level as far as polyphony goes... (Not certain about this, since I haven't done that much stress-testing.) That said, so far my app is working very well (in fact, a little better than I expected!), and certainly makes my life much easier.
It doesn't use the Performance Tool, as it performs this function itself. And yes, it is a sampler, of sorts -- a sample player, with intelligent interpretation.
And yes, buffering is done on the fly, so there's no pre-loading of samples -- one thing it definitely IS is RAM-friendly!
I have two commissions that need to be done over the next month, or so, so I'll be pressed for time, but I'm also putting a strong push on getting it out into the world.
Windows is a problem primarily because the licencing for MaxMSP (the primary platform upon which the app is built) requires me to pay $1000 up front to even offer Windows support. Lame, but unavoidable. If it looks like there will be some demand, and I have some spare dough, I may thrown down for the licencing... we'll see.
As far as Herb and an announcement goes, I do remember quite a while ago that cm was quite supportive, and gave me the "okay" to post an announcement. Obviously, things are different now that the VIs are out...
Personally, I don't think they should really mind. I mean, it is going to be donate-ware (at least for now), and any money I make is pretty much going straight into Herb's pockets! (There's still a few thousand dollars worth of VSL I'm really dying to have!). (And yes, that DOES include a few Vienna Instruments!)
cheers,
J.