Not bad seth, some of your design choices (such as texture and prop placement) seem a bit odd, but regardless, its pretty solid stuff for a first time in the source sdk. I see your using the graffiti decals, I loved using those when I first got my hand in the source engine. There is certainly evidence of a certain amount of level design experience in those screenshots. Just remember you can decrease the size of some of the light maps on those surfaces to get nice crisp shadows but remember, they increase compile times and will munch up in game performance.
Anyway, here is some of my source work I have done recently:
My entry to Snarkpits 2nd mapping competition for 2008:
A singleplayer map I'm working on called (atm) Night terror: