At the moment, I'm allowing ten slots at any given time (which seems about as many as you can keep track of anyway). These are, of course, numbered 0 - 9. One of the first points made yesterday (by laurion) is that that's pretty geeky. Every computer science student knows that the number line starts with zero, but most other people in the world thinks it starts with one.
I suspect he's right, and am leaning towards simply slicing slot 0 away, so you get threads 1 - 9. But before I go changing the code, I figure I may as well do a quick survey of opinion among my admittedly-unrepresentative friends:
Should the threads on CommYou's IM start with number 0 or 1?