Google Buzz here. There's a lot in there including my Twitter account, my shared items from Google Reader, my Picasa photos, YouTube videos and more.
I've also put up a link to my Buzz page on the top right - and included a nifty little image that someone was nice enough to make and set free out on the web.
Sure I'm biased, but I think there's something worth investing some time in with it. I live most of my life in the Google Cloud, and this seems to have quite an ambitious road map around Google services. For me it is a nice fit. Maybe it will be for you, too?
Would love to see you over on Buzz.