The SOT-89 package regulator I chose should do the job from my calculations.
It has a decent tab that I have connected directly to the top ground plane, and a bunch of vias feeding through to the bottom ground plane too.
I also settled on BAT150-04R diodes for the protection diodes.
0.27pF capacitance, 110mA current rating and 100mW power dissapation should be adequate I think?
Next I just have to work out that biasing on the invert input pin on the prescaler chip and then I think I'll be ready to spin some PCB's up for v1.0
Jared Cabot