I am interested in this also. Our pastors want to see a list of members actively connected to a current small group, but without a date connected to the groups, it's difficult to see how up-to-date the list is.
I am considering using a date association in the Activity Group (for us, the campus of each group) such as Downtown Campus Groups 2009. However, this won't appear in a person's record. For that, I'd need to associate a date with each RLC (name of the small group).
Is there a better way?
Related to the issue of involvement in a number of small groups, that can be tracked if you enter attendance (and not just participant assignments) for your groups. Obviously, it can be a challenge to keep attendance up to date, but there's a good best practice recommendation related to taking a periodic "census"; see http://experience.fellowshipone.com/blogs/deliveringchange/archive/2008/06/25/take-a-census.aspx.
Once attendance is entered, it's a permanent record, even when the participant assignment is removed.
Much grace to you.