Very cool++. I've seen nodes change and often wondered what exactly was changed.

Anyway, here's a little tweak (got rid of the magic number) to make it work with perlmonks.(org|net|com), www.perlmonks.(org|net|com) as well as that funky ads.pair.com url that I saw somewhere:

javascript:open( 'http://perlmonks.thepen.com/' + document.URL.substr(document.URL.indexOf('=') + 1, document.URL.length) + '_orig.html' )