I've never been to a conference* in my pajamas before. Virtual pajamas and real pajamas in fact. That's the sort of thing that can happen at an international conference held in Second Life.
I think this unusual style of dress for professional networking can be excused seeing as the latter part of the programme ran from 12 midnight to 5am.
I must admit though, I have been looking for an excuse to wear the rather lovely pjs I found and, in SL, there's really not much chance, as avatars don't sleep (although they have been known to nod off briefly if sufficiently bored.)
I did wear more appropriate clothing for the (relatively) serious part of my day when I - along with a brave colleague - did a presentation in both text chat and voice simultaneously. And we were not too put out to find in a later session that there was a technological gizmo that would have made the process much easier!
There's always more to learn.
If I've done it right there should be some pics of the event here.
*Virtual Worlds: Libraries, Education and Museums