It's a nice little iBook 14". I got a good deal on it since it's the recently-discontinued model and my wife's a teacher (yay, educator discount). It's basically like the listed 14" iBook except that it has a 1.3 GHz CPU, no Bluetooth, and only a ComboDrive. Well, those are fine with me and it made the purchase considerably cheaper!
I started seriously considering buying an Apple when I saw OS X. Really slick interface plus a full-featured bash shell. Rock.
The unexpected thing that I think I'll really like: Dashboard. This is new to the latest OS release (IIRC) and it allows fast access to mini-applications. This provides something on my virtual desktop that I live by on my physical desktop: sticky notes everywhere!
Anyhow... I've been really pleased with it so far. I think this'll be very handy when November rolls around; it'll be my NaNoWriMo laptop. :)