Not being able to resolve a domain name is a DNS issue. Check the settings in /etc/resolv.conf and connected files.

As of now, I have no trouble looking up the domain:

$ nslookup repository.maemo.org
Server: 130.236.x.y
Address: 130.236.x.y#53

Non-authoritative answer:
repository.maemo.org canonical name = repository.maemo.org.edgesuite.net.
repository.maemo.org.edgesuite.net canonical name = a515.g.akamai.net.
Name: a515.g.akamai.net
Address: 130.242.56.239
Name: a515.g.akamai.net
Address: 130.242.56.238