Couple of tips for those who don't think they can handle the madness of MS paint:
Work in 2X magnification or greater, the only thing you can't do whilst magnified is add text.
Take note of how many pixels the floors are generally (4 grey then 1 black IIRC) and the ceilings/doors too, this will keep all of the sections continuous when they're spliced together.
Don't be afraid to pinch little bits of other's cells but don't go too mad, the cell should be your work regardless of how good or bad you think it is.
Keep it simple, draw out exactly what details you want to put in in lines and then fill it out with colour.
If you can't draw a Vasudan take a look at the fine example in the help desk and unceremoniously copy and paste it into your own image.
Try to think about how big people are in relation to the doors and floors, create 'props' (chairs, tables, particle-beam-weapons) of a consistent size.
Keep it as much MSPaint as possible, adding in unnecessary screen captured video stills etc. looks wrong.
I was thinking that we should represent all of the 'humans' as smileys with a body if necessary, there's an awful lot of them available doing a range of different things and you can just paste them in. Anyone any comments on this?