You know, you don't really "download" the repositories. You put in proper addresses in maemo-mapper's settings. Whatever you're doing, try it with respect to maps from a non-Google repository. I'd start from scratch and follow Fragos step-by-step. I would ignore GPS until you have SOME map showing. Make your first download very modest, just very large scale, continent-size.

OK, do this:

Zoom out until you are at Zoom level 18 (it doesn't matter that you see nothing but black, it should still show zoom level when you change levels). Go to Menu >> Maps and click Yahoo Satellite, so it has a dot next to it.

Next go to Maps >> Manage Maps ... Under Setup tab, you should have selected Download Maps and By Area

(I'm assuming you have a wifi connection active.)

In Zoom tab, check off only 18, 19, and 20. Click OK.

You still don't see anything?