Basically I'm looking for a nice slim, preferrably black (whatever) case that also has enough to hold my power supply, and maybe a few small CD cases. Anyone have any ideas? Thanks in advance.
I'm not sure how much you were looking to spend, but Booq makes sleeves that hold the computer, as well as a front pouch for the power adapter (an iPod would fit in there as well), along with a back compartment for a couple of magazines/papers.
Here's the link to the general page - you could use either the PowerSleeve XS or PowerSleeve S90.
I have one for my 15" PowerBook and have been happy with it - allows me to carry the computer and a few other accessories in an easy fashion. It also has a shoulder strap.
I know it's not particularly cheap, but I thought it might suit your needs.
I really like my SleeveCase from Waterfield Designs (http://www.sfbags.com). Depending on how much storage you need, you can get the piggyback which gives you a bit more room.
The construction is top-notch, and despite my initial skeptic tendencies about all of the great feedback they have on their site, its all true!