I've just had a look at our playtesting schedule, and it doesn't look like I'll be able to get the Open Call book into playtest before June at the earliest; it's more likely to be July.
Thus, I don't need the submissions by the end of March. It seems most sensible to give you more time to work on things, so I'm extending the deadline to the end of April.
The new deadline for Open Call submissions is April 30th 2007.
Everything else remains unchanged.