Let's not overcomplicate things

Power user is generally a person who knows everything there is to know about the device and makes good use of the features.

Obviously the power users of Nokia candy bar phones (the old, non ip-friendly model) were different than the future power users of the N900.

The N900 will redefine the term power users. They'll finally be able to code the kitchen sink accessory for their phones and write scripts to make 'em sandwiches.