using your own nameserver to point to another DNS control panel
1and1 does not do custom nameservers.
Enom does.
Dreamhost domain management also allows custom nameservers.
Most Drupal shops point their own DNS at their hosts:
Lullabot, Palantir, DevSeed uses http://networkredux.net/
Acquia is using http://www.nettica.com/
Notes:
(lost the links these came from)