Thanks to a tip from fellow cycling nut @melamalie, I recently replaced my old (lost!) CatEye bike computer with a new Cannondale IQ 114 Cadence so I can work on improving my RPM. Apparently I do 55-65 RPM on average on my hybrid; possibly more on the borrowed road bike.
So far, it's pretty #awesome because - as a number-focused nerd - I can focus on my RPM rather than speed, and be less frustrated when going out w/ slower cyclists. Did 25K this morning as the mist was lifting off the lake. Great idea, SWMNBN!
UPDATE: Canondale no longer makes this computer, so, in the interests of providing data on how to configure it should you need to reset the computer (or put in a new battery), here's a link to the user manual.
The important part is as follows: