Man of Steelerator (Super Mod):
pogeypre
at: 11:44 AM 10/19/2009
Bear in mind that programs that access certain aspects of the Pre's OS (API's) sometimes do not shutdown all active processes. It might be that this app doesn't close out the process that is pulling GPS information, and as such keeps the GPS process running in perpetuity.
Be aware of this as you use Homebrew apps and let the developer know of your issues so they can try to close the battery leak in their App.