using toolbar data in the future to augment our crawl is not only a good idea
So what you are saying off the record is, The toolbar may be used to do just this in the future and is covered by your policy.
I really don't see a big problem with google sending toolbar data for crawls. I just hope it is not used to punish SEOs. I think by putting the PR on the toolbar google is luring SEOs. For what reason is another story.