In regards to wireless laser printers, I use a Brother HL-3070CW, however this is a colour laser, and not a monochrome. It's a great printer; I've put about 300 pages worth on that unit since purchasing it last November, and I have not run into any problems thus far (I know it sounds too early to tell, but I've seen other lasers begin to screw up at less than 50 pages).

Another good laser brand is Lexmark, and I would definitely recommend the T630 (although this is more for heavy-duty office use than light). I use one basically everyday at school for my B & W documents, and I've never run into any problems with the dozen, or so that are on the network. It's a great monochrome.

Stay away from Samsung & HP.