So your catalogues are empty? No Ovi, Nokia, Extras etc.?
I had the same problem last week.

Go to http://my-maemo.com/faq/showquestion...q=4&fldAuto=16
Somewhere not far from the top you'll see this:
"Catalogue name: Extras
Web address: http://repository.maemo.org/extras/
Distribution: fremantle
Components: free non-free

...or simply click here on your Maemo device to install it automatically."

Click that 'here' link and all your repositories *should* magically reappear they did on my N900 at least..