Here's an excellent (and funny) overview from Ars Technica of different kinds of switches in keyboards. http://arstechnica.com/gadgets/news/2011/02/ask-ars-ergonomi...
The "Happy Hacking" keyboard looks very nice, and has no numeric keypad. But it's ridiculously expensive. edit: apparently RMS http://geekhack.org/showthread.php?13526-Richard-Stallman-%2... and Bjarne Stroustrup http://geekhack.org/showthread.php?18556-HHKB-spotted-on-des... use them :)
To actually answer your question, the wireless Apple keyboards have nice scissor switches and are surprisingly decent to program on. And no numbers on the side!