Spoon makes a good point. You wouldn't believe how easily misinformation spreads across the internet. We've already seen reviews that claim Diaspora doesn't work without a joystick, even some that say that there are no stars in the game (because whoever wrote that didn't bother to click on a screenshot to expand it..) A lot of reviewers don't even try the game, but rather copy information from other reviews, thus perpetuating wrong information.
Fact is, at least half (if not more) of Diaspora's players play it without a stick of any kind, and we'd like to avoid situations where people don't play it because they think they need a joystick. So, if you could rectify the sentence in which you claim a joystick is a must, we'd all appreciate it.