I love Steve's idea for photo of the week month and year, I feel like that would gain a lot of interest quickly. Plus I like the faster pace of it better. I think longer time period for assignments is good, but if I get my shot in week one and the assignment takes 6 weeks, then its a long wait. I vote for Jan's idea to "announce two assignments at the same time. One current assignment and one next assignment.." That way you can have a while to work on each assignment yet there is still a relatively quick turnover of assignments.