You can edit and add new gadgets in Settings->Layout on your Blogger-Dashboard.
However, not all gadgets appear. It looks like only certain one can be shown. Interestingly, HTML/Javascript-Widgets seem to show up.
I'll have to play around a little with it, but this could be a huge improvement. It looks nice. If you like Dynamic Views, it could get interesting. Visitors seem to like those views a lot. Blog-authors of course want more customization. But blog-authors likes and reader likes are not always the same ;)
