I've been meaning to link people to some of these for a while, but I tend to forget.
Pictures for sad children, a webcomic: http://picturesforsadchildren.com/index.p
Surviving the World, which Kate linked me to today, also a webcomic: http://survivingtheworld.net/Lesson1.htm
eBooks @ Adelaide, a site with out-of-copyright classics books that are actually easy to read, and you don't even have to belong to the uni to see them: http://etext.library.adelaide.edu.au
And that'll do me for now. Although if you have any webcomics you like, let me know in the comments, if you feel like it.