For those who are interested. The latest GarageBand that comes with iLife '08 for the Macintosh is, so far, completely compatible with Kontakt Player 2 and the Garritan line of products. So many great improvements have been added to this humble prosumer application...
Choice of export codec
More effects channels
Region tracking lock
Arrangement grouping and labeling
Notation editing and printing
Incredible, and alone worth the price of the entire package for $79