I'm not sure what was ever decided for the "wall of features" thread below, but I like this basic setup which you have all probably seen:http://codebase.uservoice.com/forums/25794-codebasehq
Basically a user gets 10 votes and can vote on an existing request or create a new one. There wouldn't be money involved like the previous thread talked about. This might be a good compromise however. The service offers a free version which would allow us to at least get a pulse for the communities' needs beyond these forums. Which the forums are great, but they don't allow us to easily quantify and visualize the data.
Which I realize that you are building up new architecture for 1.4, however it might be a good exercise for us to understand the user stories while we are planning that new design. That way we are designing the best tool, not just a clone of 1.3.