Which repos are not working?

Normal repository.maemo.org ones?
They are working fine for "all of us". At least no on else complained (including me ).

Or the old maemo.nokia.com ones, which are now mirrored?

I read that the maemo.org are affected on your device.
Did you try to ping them, browse via http? It seems to like a DNS or network problem on your side?
Did you check the settings? Or /etc/apt/sources.list.d/hildon-applica
tion-manager.list?