It's fairly trivial to load jQuery/other libraries from the Google CDN and fall back to a local copy if it fails as long as you're not using async/deferred.

We've got it baked into our boilerplate.

If Google decides to charge for use of their CDN, then I wish them luck. They don't have any billing information and short of serving a bastardized jQuery (simply not serving it will trigger the fallback) our projects will continue as they've always been.