In one of the other volume calculator threads STC67 suggested some definitions might come in handy for different levels of ability. I totally agree, and have made the same comment in a couple of other posts.
With all of the differing opinions that are no doubt out there regarding what constitutes intermediate, at what point are you advanced, etc, a standard set of definitions that Firewire works to is the key ingredient missing from what is otherwise an awesomely informative site. This is fairly common practice for most decent ski/snowboarding schools, who use a short paragraph or set of bullet points describing where your skiing or boarding is at (you can consistently link S turns, yada, yada, yada) to stream skiers and boarders into the appropriate group classes. I would apply the same thinking to define fitness level.
This would be very handy when using the volume calculator, which unless I talk my ability and fitness above what I would define them to be, steers me towards bigger boards than I'm currently riding and am more than happy with. In fact for two of them (Dom and Hellfire) if I had to change them I'd go down a size rather than up.