I did something similar as a weekend project, haven't checked-up on it in a while but it seems to still work: http://const.it/http://online.wsj.com/article/SB100014240529...

The original idea was just to provide a consistent link which would fallback to a cache when necessary and back to the original content for reddit/hn type traffic. Then it made sense to do some paywall busting and readability functionality on top of it and those features overshadowed the original concerns.