After having mine for a little over a month now, I still love it.
I'm somewhat of an Apple collector and have pretty seriously gotten into collecting "Steve Jobs" era PPC Macs(as well as dabbling in some older PPC computers and a few 68K computers). I wanted the Blackbook for my collection, but it really is still a very useable computer. 10.7 is current enough to run a LOT of software. Despite the 2gb of RAM, mine is also pleasantly peppy with an SSD.
The plastic on the black Macbooks has a very different "feel" from the white ones. It is a little bit rough, although not uncomfortably so like some cheap Windows laptops. This is compared to the various white polycarbonate Apple laptops(I have an iBook G3, iBook G4, and Macbook to compare), which are very "slick" feeling except around the keyboard.
Apple goes to great lengths to encompass the make the entire user experience pleasurable, and I think that the black Macbooks have by far and away the nicest feeling plastic of any plastic laptop I've used(The Lombard/Pismo Powerbooks are probably second, but a totally different class of computers). This is important for something that you actually spend a lot of time holding.