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it's been done in other cms's as well, i've seen it done to manage news submissions before, i believe (don't remember what cms, saw it almost a year ago, lol)
so yeah, it's feasible, dunno if anyone here would want to take the time to develop that...
tho, i believe usually the app that you use from your desktop, is actually something free that you can implement.. you just gotta track down the guys that make it to get a copy, cus i don't remember who, ehehe