who's doing a mud run, which type, and what training?

I'm doing a marine corps mud run next month and need to figure out my training to prepare for it. Any ideas would be appreciated. I know that there are others on here that have done one and I'm curious about the distance (they've added another mile this year) and how you prepared or are preparing for it. In case you're curious, here are the obsticales:

Competitive Race


Plenty-o-push-ups
Plenty-o-leg Lifts
Plenty-o-side straddle hops (aka jumping jacks)
Race begins with 50ft duck walk, run
100 feet lunges, run
Tire flips (as a heads up: MTVR tires weigh about 400lbs each)
50ft frog hop
50ft lunges, run
400ft duck walk of death, run (added for your pleasure and our enjoyment)
Water station, run
150ft low crawl uphill at 45o
150ft bear crawl backwards downhill at 45o
100ft low crawl uphill at 600
10 flutter kicks in the sand, run
Water station, run
10 push ups, run
10 side straddle hops, run
30ft Fireman’s carry
30ft Fireman’s carry – partners switch, run
10 squat thrusts, run
10 leg lifts, run
Trip wire obstacle, run
Water station, run
150ft bunny hop
150ft lunges
Build-a-house inline team push-up, run
Obstacle A-frame wall
Obstacle incline wall
Obstacle Sono-tubes
Obstacle tire drills, run
Water station, run
Obstacle over-unders, run
Water station, run
Obstacle spider web, run
Obstacle 1st mud pit: low crawl, run
Water station
Obstacle 2nd mud pit: low crawl
Obstacle 2nd mud pit: A-frame wall
Obstacle 2nd mud pit: 5 push-ups
Obstacle 2nd mud pit: low crawl
Obstacle 2nd mud pit: incline wall
Obstacle 2nd mud pit: ladder wall
Obstacle 2nd mud pit: duck walk
Obstacle 2nd mud pit: 10 mountain climbers
Obstacle 2nd mud pit: 5 side straddle hops
Water station, run
75ft frog hops, run
Water station, run
50ft duck walk uphill
Finish line: arm-in-arm, holding hands, carrying each other, etc.