I'd love for some kind of API, that can be used by fan sites to automatically retrieve freely available information from the game servers.
For example, this page on my guild website lists all 100 guild members, including their avatar and level. Currently, this information has to be entered manually, but if I could write a script that updates this list it would save a lot of time. I'd need to get a list of 'players in the guild', their guild rank, avatar and current level.
As another example, this page lists all adventures, and their rewards. Again, it would be very handy if I had a script which I could run when new adventures are released, that would update the data in the database for me. I'd need to be able to grab the adventure and reward information, as well as a list of current trades in the TO, to update the max, min and average trade prices for each adventure.
Many online games provide a method to retrieve information from the game servers in this way. I'd love it if BB could provide something similar.