I'm not going to list every site on the subject, only some of the best!
Most of these sites have extensive link sections as well, so just look
at this as a place to start! 

Check out the sites of some of the artists who inspired me (listed alphabetically - well, sort of):

Links to some great wargames sites (most of these sites feature great painting too):

Here are links to companies that produce my favorite models:

And the Weekly Larry Leadhead Cartoon! Click on the cartoon for more strips: