Thanks for the kind words; we're really glad you like it! And we *really* like it when you tell others drivers how awesome our software is. 
As for troubleshooting the GPS ... does the GPS work in Streets and Trips? Once it's working there, close Streets and Trips AND Logbook; then run Logbook by itself (Streets & Trips should not be running). Do you get the "No good fix" message in the status bar in the lower-right? If so, try clicking on the grid at the current time, and the click the "Get GPS Location" button and see if it, too, says "No good fix" or if you get a valid reading. Let me know the results and we'll proceed from there.
By the way, if you log in at our website (see Login in the top-right corner of most pages) you can post questions at our General Support area rather than just here in the sales-question area.
Cheers,
--LarryBoy