Well, finally found some and narrowed it down. Seems there are only two flavors: CMOS wireless cameras transmitting to their own receiver and on to a TV/VCR (no software), running about $100 on up; or CMOS wireless IP cameras transmitting to an established network (ie., router or access point), start about $150 but not outdoor rated until about the $250 range. Found cameras from D-Link, Hawking, and TRENDnet, but I'm going with a Chinese knock-off called GadSpot NC1000-W10. Its only 802.11b but has audio and seems a little more rugged. Runs about $150 but I will need to build a box or cover to keep it dry.