I would like to move from Google Analytics to our own software. Piwik is open source, and we are running our instance on our own server. I'm going to be comparing them for a few days. Barring any major issues, we are going to move over to Piwik.
On a related note, vimeo videos carry Comscore code that tracks their embedded videos.
http://vimeo.com/forums/topic:44603
If this really bugs you, I've added the option to toggle off the video previews in your profile. (Maybe I will make this vimeo specific?) You will still see the video if you click on the post itself, however.
Feedback is appreciated. Thanks!