Just so that you or anyone else has similar problems. I re-imaged my 770 with the latest hacker edition, then tried to install maemo-mapper using the deb package. It did not work correctly, complaining about the same libsqllite as you mentioned. So to solve the problem I simply added the following repositories:

1) Maemo hackers
2) Maemo repository
3) Maemo extras

They are all listed here. http://maemo.org/community/wiki/appl...nrepositories/

Then it was just a matter of using the application manager to install maemo mapper. After that everything was hunky dory.