Philipp Lenssen pointed out that my concept of Unbreakable Links is, unsurprisingly, not a new one. It's also known as
Cool, but shouldn’t you link to your linktron like so: http://www.google.com/search?q=linktron5000+gotchas+automagically+unbreakable+irreversiblebtnI=1 ??
if everyone started using this kind of link then google wouldn’t be able to index anything.
timb, do as I say not as I do! 
I’m actually liking the hybrid approach, where you build the link like so, for the best of both worlds…
The question is, who would be processing that lexical-signature key?
Mr.Internet: google could resolve its own links, and as stated above, I think we need both techniques in the same URL: relative and absolute.