Not much to put. I am a decent portal mapper, and soon-to-be portal 2 mapper.
A few screenshots of my P2 mappack, available for download on ModDB and MyApertureLabs!
Note that all custom content (save for a few sounds mentioned in the end credits) was made(or ripped in some sound's case) by me. Took a fair amount of work too :P
BTW, the reason the lower wall piece is clipping is because it moves and you normally wouldn't see it from this angle.