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@Robslow
I own an uglier Fuji track than Voidcores :P but I'll throw my 2 cents out there anyway:
Riding fixed isnt the same as geared but it will give you some incidation ^^ If you consider flywheel effects, straighter chainline etc, then you can usually push a gear a couple of ratio's harder on the fixed for pretty much the same effort as riding a geared bike. Riding geared then finding a gear you spin on your usual terrain most comfortably, then choosing a ratio 2 higher or something is good for riding (but probly wont help as much with choosing something for skidding around easily).
Plus your ratio is going to depend on the type of riding you do, I ride 48:15 (approx 84") on my fuji track, its fast and comfortable but there is no hope of skidding around (for me anyway).
With skidding there is a way to work out how many skid patches, you simply simplify the ratio as far as possible and the denominator indicates the number of skid patches. This assumes you always use the same leg possitioning to skid. Check Sheldon Brown's site out for explinations in more depths. but one example, I ride 48/15 so this will simplify down to 16/5, meaning this ratio has 5 skid patches.