1. Don't email me Buzz! I already see when I have new Buzz postings, it's right below my inbox. I don't need it to duplicate into my inbox as well.
2. If someone is going to link blog posts into Buzz, the comment I make on Buzz, or on their blog post should cross-pollinate. Meaning, it should show up in both places no matter where I leave the comment. Especially if it is a Blogger format.
Also of interest, I came across this infographic about facebook from Mashable: