The Jim Dalrymple review is a podcast that you can listen to. The audio app part is about 1/3 of the way through the podcast.
http://libsyn.com/media/macnotables/MN676.mp3I've transcribed some of the juicy bits:
Jim sez: "I'll go downstairs and I'll plug-in my guitar through my PODxt Live, which I think is the best hardware music device that's made. It's by Line 6. My POD is connected through my G5 through USB so all of my music applications recognize it instantly."
Then he talks about how RiffWorks is available from Line 6 and Sonoma Wire Works, then he explains it:
"Different than Garage Band. It's RiffWorks....So you plug your guitar in and you open up RiffWorks. You're presented with a nice interface. You can control the sound of your guitar from RiffWorks if you'd like or you can have it controlled from your device. It records things not as a whole song but as segments. It has drums in it as well from Drums on Demand and others. You pick your opening drum loop. You play 4 or 8 beats of your guitar. Then you stop. Then you pick your verse drum loop, then you play your verse on your guitar and you record it. Then you stop. Then you play your chorus. And then you build your song. So you just click on your intro and drag it up into the time line. Then you drag your verse into the time line. Then you drag your chorus up into the time line. Then you can start mixing and matching. You can pick a bridge drum loop. Put another verse in, another chorus in and another bridge so you have a break in there...and mix and match however you like. It's completely different than recording a whole song at once or trying to figure out where you should stop. It's predetermined where you stop. It's really different and really good. You're able to build something very quickly. I hope I explained that so it sounds good. I really like this application. I found it a lot of fun. I'm coming from Logic and Cubase and then taking a look at RiffWorks, I wasn't sure if I'd like it or not, but I really did. I really enjoyed it!"