Hard case is interesting. I already wired my LuggageLocker Tanklocker bag with the same PowerLet kit and run my farkles out of it already. Now a hardcase with compartments would ROCK.
i thought i was super clever when i thought of getting some of those gascap rings and attaching a waterproof pelican case instead of the normal softbag... but some one beat me to the punch:
http://www.twistedthrottle.com/trade/productview/3687/614/guess i'm no more clever than the next guy

i DO wish they would offer the next case size up (pelican 1200) to be more like the size of a normal tankbag. steering lock/handlebars, tank size, and gascap location will determine what can be fit to each bike, though.