http://www.techcrunch.com/2008/02/10/tipjoy-a-better-tip-jar-for-content/

Or any of the other SEO Bloggers you like
http://www.tipjoy.com/

Could this be the alternative to accepting paid links or banner advertising
for cash hungry Bloggers
http://www.mattcutts.com/blog/selling-links-that-pass-pagerank/

Google should have something as an alternative for this :P

It's a cute idea :)