Some year-end stats from the SH fiction department, in case anyone's interested:
During the eleven months in which we were open to subs in 2003, we received about 2,170 submissions (averaging a little under 200 a month), by about 1300 authors; our average response time during 2003 was slightly over 25 days, and our longest response time was 61 days.
(I'm not certain of the number of authors, but I think it's about right.)
Our five most prolific submitters sent us ten to twelve stories apiece.
Our highest-volume day was 1/1/2003, with 22 submissions; our highest-volume month was January, with 270 submissions.