The more the merrier, [@May96]. I would suggest browsing not only those you know of but collaborating with your cohort to find others too, where time and availability affords of course. On a related note, speaking to forum activity, it more or less follows that of education; most active during periods where students are out of class for the day or after work, slowing most during exam periods. Keeping this in mind should make your posting life much less stressful.