go to the below site. seems that Congress and the Senator from Colt is getting involved. Was introduces here (home of Fort Bragg and the then deployed 30th Brigade)as the newest and latest weapons to enter the Army.
The blog seems right as it states that 2 brigades were to get them this year.
Trying to make it the Stoner weapons system, again another weapon opposed by teh Senator from Colt.
The failure mentioned was low battery life I think.
http://en.wikipedia.org/wiki/XM-8