-While we will gladly accept traffic from almost anywhere at the moment, we are restricted to English-speaking audiences.
-That isn't an issue at all: we don't require a continuos 'spot' per se, a segment of your monthly traffic would be perfect.
-While the size itself is flexible to an extent, we do try to ensure our ads are subtle and non-intrusive, and the 250x100 rectangle is a perfect medium for that. Furthermore, the Leaderboard and Tower formats really aren't suited to the static (no distracting animations) design we utilize.