just grab some software, that can grab a single frame from your webcam (have a quick look at freshmeat, I'm sure you will find somethink there).
Then, for example, make a cronjob or write a timed script, in which you grab a frame from the cam and place it in /var/www/htdocs ... or where apache looks for its documents. Then simply make a website, that only displays the image and the date and time if you like ... or you coulkd access the image directly with something like: http://your-ip/webcam.jpg
The other way, but much more complicated would be a little cgi-script, that captures a frame from the cam; but I am not sure if this is possible... due to security settings of apache or perl or something...
If you are not satisfied with webcam images... you would propably need some kind of streaming software ... like all pro's on the internet use ... but I am sorry... I have never dealt with that before ...
HopŘe I could help you a little, little bit :-)