MMario,
It was quite simple. Rita (Ferrara) was in charge of scheduling. One of the workshops she created was The Mudcat Cafe, a chance to hear those on-line people perfomr in person. Well, it was hard to resist, so I personally didn't even try. At the end of the workshop, it was suggested we all go outside for a group photo.
And that's how it was done.
I should humbly note that the 1999 FSGW Getaway now holds the record for the largest number of Mudcatters in one photo.
Any challengers?
Big RiB