I applied the new xbox live update last night... I was somewhat indifferent overall. The ESPN3 app required a few downloads, and after that was all done it appears it doesn't support Time Warner customers yet.
This link seems to indicate they're trying to get that resolved by the end of the year (by connecting an xbox live ID to the time warner myservices login, I'd assume). Did anyone give it a try last night? The ESPN.com highlights it did allow me access to seemed to stream in good quality with little trouble.
Not a fan of the new Netflix interface. I'm sure the ability to search for titles will be useful on there at some point, but too many of the new UI parts blended into the background, and moving up and down between categories seemed slower. Also had significant issues with playback, but that could've been on my end or just related to the rush of people on Live last night.
Don't remember what the other parts of the update were.