According to comments made to MacWorld, Apple will also be releasing a fully featured 30-day demo of Aperture as well as new camera RAW support (Nikon D80, Canon XTI).
Very cool!! I've been wanting to test drive this app for some time now. I have been using the Adobe Lightroom beta for a few weeks now and really wanted to compare the two. I'm new to this type of "Pro" level application but I have seen enough of Lightroom to know I will probably buy it (or something like it) some time this coming year. I'm glad I will be able to check out Apple's offering.
.....downloading now.....