There was an invasion of Yvews in Gothador today. I managed to kill seven Yvews, six Enhanced Yvews, and four Yvew Lords. These are very powerful transdimensional creatures that give lots of experience points (especially if you make the last few hits with the Drow Dagger). I managed to go up plenty of levels, and got lots of neat items — including three spells. I got KS'ed twice, though. The first time it was by Slayer, the second time was by Rhaetou. I did get the items and gp from these creatures, at least.
For those of you who are in the Cult of Faeries, just drop me an email if you need some Yvew items.