Cool. Good to know!
I have a DynoJet wideband controller with a needle guage, and datalogging (which is redundant, but it was a good deal). It's consistant with the MegaSquirt readout. I'm now running up to 16.5:1 at the leanest, but mostly around 16.
With the power, and low resistence of the car, the manifold pressure is very low at cruising.