Here's a new picture of my recently upgraded Marin Muirwoods 29er:



The list of accessories and upgrades to date:

SKS fenders
Delta Universal rack
Cateye EL-530 headlight
Planet Bike Superflash taillight
Trek Incite 11i computer
Crank Brothers Egg Beater pedals
Nashbar 400mm seat post (what kind of MTB comes with a 300mm seat post???)
Tiagra rear derailleur (needed the Deore to go to wider gearing on my Kona Jake)
Profile Design Boxer bar ends
Lizard Skins bar end grips
Specialized Avatar saddle
Avid BB7 mechanical disc brakes (from the stock BB5s)
Avid Speed Dial SL brake levers

See my separate thread on the latest upgrades for more pics.