Webcam32 appears to be a webcam software for Microsoft Windows, and it markets itself as the ultimate solution for the said job. Features appear to include everything you may expect, like push, FTP uploads, captions, even motion detection. Made by Surveyor Corporation (http://www.surveyor.com/).
(No, I have never used it, it just appears to be fairly popular software for this purpose. Being geek, I wrote my own camera-httpd-interface script. =)