Let's try doing a "question of the month" post for the Bicycles.SE site blog. There could be more than one question featured, but let's keep this to questions submitted during the month of August.
freiheit has already suggested a few questions in chat.
It'd be great if people could post questions here that they particularly like, one question per answer so we can vote them up and down. Importantly, why do you like the question? I'll make this community wiki, so feel free to edit anything here, including this question.
(Alternatively, if you think this post(s)-of-the-month thing is a terrible idea, tell everyone why.)
Edit: Importantly, will anyone here volunteer to write this up?