It's a bit surprising to me that Google+ isn't particularly well integrated with Buzz. For example, Buzz has all kinds of import features, e.g., from Twitter, but there's nothing like that for Google+, and Buzz posts don't automatically end up on your Google+ wall posting tab.

What's clear is that they're trying to match or exceed all of the various Facebook features. Picture sharing and tagging. Etc. There are a couple new and very good things. They've got multi-user video conferencing. They've got multi-user mobile-phone instant messaging (but not integrated with Google Talk). They've got sharing of favorite posts (but not integrated with Google Reader).