Google Analytics makes site owners illegal
According to Swedish and European Union law, it's illegal to set cookies without telling people on the site that you do, what they're used for and how they can be avoided.
Google Analytics, GA, does set cookies. What information they collect from your visitors is impossible to know (one of the cookies is valid until 2038, though...). When a lot of people, among them probably many bloggers, start using GA they will in fact break the law unless they warn their visitors. And how many will do that?
There's been a lot of discussion about this in Sweden today. It is very relevant. I assume that the same discussion is relevant for all other remote stats services -- but, as always with Google, their services become huge.
Considering that European police forces probably won't be doing raids to catch bloggers that don't warn about cookies, I think that an equally important discussion is what these cookies do. What information are we providing Google with?