I was surprised when I emailed Velocity to find they build all their wheels to the same tension regardless of size or spoke count. The park converted numbers are about what CFboy mentioned, so his wheels are dead on. One of the advantages to building with quality stuff is one can get a manufacturer's recommendations for the the tension.

Here is an article that relates tension to musical pitch. While this might be more difficult than a gage, it might be fairly easy to establish on the run in SA, and also as a method of checking tension of adjacent spokes. It is possible to have fairly divergent tensions even when the wheel appears to be true.