B&H has an interview on the Sony PMW-EX1 camcorder with Doug Jensen, a veteran of the production industry, who has worked extensively with Sony camcorders for years. He is asked many questions regarding the camcorder, workflow, and quality, among other things. If you are looking at the PMW-EX1 as either a primary or secondary camcorder, this is a great article to read.
While searching for info on the Sony PMW-EX1 I came across this site http://www.studio1productions.com/vsb1.htm
They are making a shoulder brace specifically for the EX1. The brace looks pretty good.
Rob