I've been sitting back the last few days, wondering if and/or how to post to this thread (and if someone would get this thread locked before I did respond).

First off, Glen - congratulations. I also remember how excited you were when you joined. I also just remembered one of the pictures from Fergus - "DO meet other members of your clan society" or something along those lines. I don't know if you're familar with the comedic work of Jeff Foxworthy, but there's a redneck joke in there somewhere.
Seriously, though, enjoy your membership, and if through it you learn more of the clan's history and your family's place in it, more power to you.

Now, throughout this thread there has been mention of the misinformation and fallacy of sept and family lists. As a counterpoint, may I mention that some clan societies have professional genealogists in their employ, in order to more comprehensively track the dispersion and/or migration of the clan over time. And this is being backed up with DNA research in some cases - Clan Donnachaidh has been doing genetic tracking for the last five years.
Or, if you prefer a more low tech approach, some clan societies "limit" sept-name inclusion in the clan to people whose ancestors resided within the historic geographic boundaries of the clan. Clan Donald USA has taken this approach.

My two cents.
Gary, who is his own fourth cousin (and therefore knows what genealogical research can turn up)