As the founder of a guild, I'd really like to know...

[Excellio]

If any of my guild's members were among those caught cheating in the recent cheater-catching-thing.

Do I have any manner by which I can find this out, aside from asking all of them and hoping they tell me?

[Humerox]

Well...if they're gone for about a week or two, and are suddenly quite a few levels lower than you remember them, that'll be a start.

Check references on new guild apps, too.

Good luck!

:D