The latest version of safari has a nice 'reader' option that removes ads and things from online articles: http://www.apple.com/safari/whats-new.html
The stories on ABCtales look great in reader... just clean black on white text, no comments or links to distract from the writing. Longer pieces especially are more comfortable like that. It also give you a nicer version for printing.
Not sure if other browsers have something similar...