Yesterday I converted my Niner to a 1x9 drivetrain. Came out quite nice. I used a Spot bashguard and an N-Gear JumpStop to keep the chain on the chainring. I had already shortened up my chain when blocking out my big ring, so that was dialed. Pulled off the front deraileur and shifter, dropping probably 3/4 of a pount. Bike weighs exactly 27.05 pounds now according to my digital scale.
I have also put on a WTB Weirwolf 2.55 LT tire up front, but haven't been very impressed. Here's my review of that. I've basically been riding this bike as 1x9 for the last several rides anyway, so should be great.
I am the VP of Engineering at DealBase.com (the largest hotel deals web site), an independent software developer, as well as VP of Engineering at Bring Light. And for the non-professional side of life, I have a great family with two small kids, love to ride bicycles, and enjoy living in Eugene, OR.