Google Analytics New Code

I am just about to implement the new Google Analytics tracking code. One of the features of this is said to be cross domain tracking. This would be useful for us as I run more than 1 website with links between them, but are Google doing a doubleclick on this?

When I say that what I mean is that Doubleclick is notorious for putting a cookie on your system, then tracking you across the many sites they serve ads to. This invades the users privacy but allows them to build up a profile of who you are and what you like.

As Google has just acquired Doubleclick, are they trying the same trick? Wouldn’t allowing it’s users to track across domains, also allow Google to do the same across the many sites where analytics is installed.

I have to say I am a big fan of Analytics and am contantly amazed by the complexity and new features that are brought online, and for free. I am going to continue with the upgrade, but I am a bit worried about it!