This has been a hot topic on the official
boards.
There were a few level 42-45 droppers in Tal Bruinen that mysteriously stopped spawning. What has been gleaned is they were not working properly (i.e. spawining in the same campable locations too often) so they were pulled. Price in AH dropped considerably (400sp) but now prices are back up above 1gp.
You can still get them off other signature mobs scattered around Middle Earth. Someone may be able to scrounge up the link to the dropper list. I'll edit this if I find it again. Most often these sites are camped by gold-sellers so getting one has become a pain.
I think there are some things planned for book 12 in regards to shard droppers.
If they are going to continue to have them drop from signatures, they need to make them spawn in random spots. I would prefer a small percentage drop from RANDOM mobs above a certain level. That way the gold-sellers could not easily corner the market.
List Edited, Jan 21st 2008 11:07am by Dottiel