If you're an experienced scripter I hope you won't limit yourself to the Role-Playing genre, there's an awful lot of potential for creativity in Freeroam since you don't need to conform to anything being 'realistic' or relevant to existing game mechanics, just fun and original. Probably some potential in other game modes too.
There has been work done in the past on scripts that can 'record' your movements, such that it can be replayed back to you by the script, allowing you to record it with FRAPS or something. But the ones I've seen are either heavy on cpu usage or glitch/desync a lot - perhaps people in the community would find something like that useful, if it could be done more successfully.