Wayki (using BasicDialog)
Wayki is a geographic message board, that allows you to post items such as photos, items for sale, places, events and other things on a map. By posting on Wayki you can share information about your local geographic area with other people around the world, or browse your area to see what's around.
We use the BasicDialog as a floating window over a Google Map. The BasicDialog works perfectly for our needs, the tabs being one thing that we really had issues with using other types of windowing widgets. We also use the YUI based Carousel component (http://www.billwscott.com/carousel) for uploading and viewing images.
Have a look around and feel free to post things of interest on Wayki!