justinf
I completely agree, but not everyone will, and that perception is key to the discussion.
Your angst over this new system depends largely on whether you consider behavior outside of your browser to take place in a public or private space.
I have mixed feelings about the new system. On the one hand, I respect a lot of what Canonical is doing with linux regarding mainstreaming, streamlining, and even Unity. I also recognize that they are a company and need to make money, and think Amazon integration is preferable to dozens of preinstalled, hard-to-remove junkware applications.
On the other hand, I really don't like the intrusive-by-default nature of the integration, and the fact that I'll have to go tell all the folks I've installed Ubuntu for that they need to essentially disable spyware the next time they do a distribution upgrade.
On the third hand (what, you don't have one?) I'm not sure what other profitable solutions Canonical might implement in a community that values privacy and freedom.
If I were looking to make a portable and semi-futureproof toolkit right now, I'd use jQuery as a base, but limit myself to some big features, like dom queries, events, and ajax. Then I'd make sure I had it sandboxed inside all my code via anonymous functions (function($) { /* my code */ })(jQuery); so I could swap in a lighter replacement later on without a headache.