Perhaps not appropriate for your app, but who knows, maybe? But this is my favorite UI that I've seen in a very long time. Just click on any of the content boxes. http://spacecollective.org/projects/The-Total-Library
That site has one of my pet peeves. At the top, there is a Flash element. Wanting to see the full site design, I allowed Flash to run on the page. What did I see? Text. Just text. At worst, it would have taken a PNG to produce the same thing, but they decided to create an entire Flash app devoted to displaying some text.
I think they're using it for a cross-browser solution for rendering custom fonts. There's nothing wrong with that, though we'd be better served if they used a progressive enhancement strategy -- they're replacing a single space character with their Flash banner, when instead they should be replacing a text representation of it:
e.g., Instead of:
they should do this: project: The Total Library (They use JavaScript to replace that element with the Flash banner)