Comments are good ummkay. John Chow has his top commenter’s displayed on the sidebar of his front page. So far 20 comments will get a link to your site. All free. Don’t spam tho noobs. Johncow has the same set up and requires less comments. Basically if you find a blog that showcases top commenters you should leave comments and you’ll get a free link. It doesn’t help for pagerank but you’ll probably get some traffic your way.