The first interesting thing is a tutorial by Emusician magazine about Resonance and Radiation. Interesting information about how various woodwind and brass instruments sound radiates out. It is more geared toward recording but it is interesting none the less (and it’s from 1994, go figure!)
The second thing is, well, cool and/or disturbing. A Midi Bag Pipe. Yes, you heard right. You can now, for about $400, practice bag pipes virtually. The best part, you don’t have to blow into it, nor do other people need to hear it. Gotta love technology.