A recent post from Museum 2.0 (I know, I know, but I suppose everyone has a 2.0 niche) considers the question of “How much time does it take“.
The post attempts to offer advice on the time commitments required for various Web 2.0 roles. Translated – if you want a school administrator, a teacher, etc. to blog, podcast or whatever, just what will the time commitment be.
The post proposes the time required to qualify as a content provider (maintain a blog, podcast) is 5-10 hours per week. You get off easier for a Facebook or MySpace account – 1-5 hours.
I am not sure how one arrives at such numbers. Experience I suppose. 5 hours a week seems about right for a blog.