ANN: LatLongUTMconversion 1.0 - convert lat/lon to UTM
Finally got around to publishing one of the modules that makes up pygps. With it, you can convert latitude/longitude coordinates into UTM coordinates. There's actually a bunch of flavors of lat/lon, so you have to specify which datum you want. GPS receivers use datum #23, WGS-84, so if you're using LLtoUTM with a GPS receiver to make map coordinates, you'll hard-code 23 as the first parameter.
This is mature code; haven't changed it in over a year.
Note that this code doesn't convert the other way, even though I have the algorithm to do it. Why not? I just never needed it. If you do, bug me about it by showering $20 bills on my head. Or go create a project with the Public Software Fund at http://pubsoft.org/ .