This thread is stale but I figured being completely on topic was better than starting a new one.
My new home build is visible
at artsteinmetz.com.
There are three images updated every minute from three different cameras. Webcam 1 is a cheapo logitech USB cam. About $40.
Webcam 2 is a
Swann Nighthawk wireless analog camera about 100 ft from the receiver plugged into a Haupaugge WinTV capture card. About $120 including receiver, but not the capture card.
Webcam 3 is an
Axis 207W wireless IP camera. About $265. The wired-only version is $245.
The axis is clearly superior. The max res of 640x480 exceeds the NTSC video of the Swann (the image here is 320x400), but the color fidelity of the Swann is poor. the live video is very smooth if you use MPEG-4 encoding rather than Motion-JPEG. It's kind of wild watching the workers on my house while riding the train in the morning!
D-Link makes a cheaper cam with a built-in web server ($140 for the wireless version) which I might try though I suspect from the reviews at newegg.com that the image quality will not be great.
The moral of this is you get what you pay for. More specifically I am sold on the idea that IP cameras are a better solution than analog cameras wired into a multiport capture device becase of the image quality.