I got my tickets for the 150 Anniversary get together for the Mountain Meadow Massacre!!!!!! My mom got them, which is ever so nice of her, and I will be going in September. One of the orginizations that is hosting the event is the Mountain Meadow Massacre Association, one is the Mountian Meadow Descentant's Association.
Wikipedia has quite a bit of information on the Massacre.
This article is quite interesting and I think is something that everyone should read.
Here is a list of links to different newpaper accounts of the massacre from the 1800's.