Here is a screenshot of the UI (user interface) that I am building in Flash for my PBBG Perenthia. I am converting the AJAX/HTML elements to Flash so it it somewhat incomplete but does give you the overall feel of the interface. The place where that gray square is will be the map and next to the map will be displayed the name of the place/room you are in and a listing of other players, NPCs, etc. in that place/room.

I am going to do a write up with my findings in regards to the Perenthia PBBG UI using AJAX, Flash and Silverlight. Might do that sometime later today.