Just finished up the new monster truck wheels. Kris Holm 47mm wide rims, WTB 2.55 weirwolf's (not really that wide unfortunately), and XT hubs. Split tubed ghetto tubeless (homemade stan's strip from a 24" tube) and held air great all night.
Not a ton of clearance on the back (plenty on the front), but oh so much more float for those "secret" winter trails.
Now I need to really think about registering for some of those crazy endurance races held at stupid low temps.
No, your coworkers probably would not be impressed. What would impress them? You pitching in more around the office.