I think a software servo library (which I assume is what the Wiring example is) would be great. Yeah there have to be some coveats but thats ok. I come from using the PICAXE platform which has a "servo" command that allows the pin to be specified and the angle to be specified.
Because of the .75 to 2.25ms pulses every 20ms they simply used a servo position that ranged from 75 to 225. This worked nicely within a byte variable you just have to be sure not to give it a number beyond that range. Also not all servos could drive the full 180 (sometimes not 2 servos of the same make & model) so it would sometimes require testing the limits of each particular servo by starting with a smaller range.
Keep it simple!
Cheers.