Here's a couple of E3 Eggs just in case anyone haven't tried them yet :-)
On the first level, go down to the bottom-left of the map (can use Orbs of Sight).
Get into the very bottom-left room. You will need to use the Dispel Barrier or Crystals of Piercing. The route is very obvious...
Put a pair of Pants (the inventory item) on the pillar, then step on the rune ;-)
And another one:
Go to Dellston, Find Rita, Ask her about 'coffee' and then say 'perfect'