Half the challenge of being a fan of webcomics is finding webcomics. There are a number of good directories of webcomics, some more inclusive and some more selective but all ultimately edited by one or a select group of people. Check out the Wikipedia for a list of webcomics that can be edited by anyone. I just added my own effort.
There is also a growing entry on the medium of webcomics itself. The nature of a wiki site is that anyone can make any term on it link to a new entry. I just added one to Comixpedia. For better or worse all of you can also go edit the entry on Comixpedia.