Displaying avatar anywhere in template, and bbuserinfo question

[t325]

I've got 2 quick questions. I'm working on a template, and I want to place the user's avatar on the front page. Not in the navbar, but somewhere else. How would I go about doing this? If they're guest, or have no avatar, I want to display another image, like noavatar.gif

Also, is there a place where I can find out what values are in the $bbuserinfo array? I have a feeling I'll need some, so I'd really like to have a list of what's available. Thanks