I'm listing some easter-eggs which I have found in ITE. Other people can add their discoveries as well.
-At the Glassmaker's shop in the Ferrat Village, there is a piece of glasswork that looks just like the Dreamer's Guild logo (Original Versions Only)
Oh, thats all I can think of at the moment...
The stained-glass version of the Dreamers Guild logo can be seen here beside company co-founder and logo designer Robert McNally:
(https://wyrmkeep.com/forums/proxy.php?request=http%3A%2F%2Fwww.wyrmkeep.com%2Fite%2Fauthors%2Frobertmcnally.jpg&hash=aa482e795371520e1e117afbb8498593ca2c95f9)