I found a new piece of software today that is very similar to CD Wave, but designed for Mac (Tiger and Leopard OS's).
Unfortunately, it's
not free. You can upgrade to the full version for $32. I am going to buy it, it looks to be by far the easiest and lightest tracking program that I've seen, without having to open a full editing suite just to split files. You can also normalize, rename, and add metadata to the resulting files. Pretty cool- very easy to use on the fly or quickly scrolling through the wave.
Also, the trial is very limited-- it will put fades in your saved files, so it's useless beyond trying it out.