Okay, our reccing period poll showed very strong support for a two-week reccing period instead of biweekly recs, so two weeks it is. However, there was also some support for moving beyond 4-7 recs, so I'm going to try splitting the difference between low/high options at 4-10. You are by no means required to rec 10 fics, but please feel free to if you like.
I'll contact those of you who have signed up to rec over the next few months to confirm your two-week timeslots.
Thanks again for your input here, and for your continued support of the comm.