upgrading to 0.7

["Eric S. Johansson" <esj harvee org>]

I apologize if this is a frequently asked question but I'm trying to upgrade to
 network manager 0.7 (Or later)  on ubuntu 8.04.  the last time I updated with
some time last June with some .debs one of the developers created out of the svn
tree.  I've been trying to connect to the network manager repository but, the
PGP key doesn't match (or so it seems).  After following the instructions for
key extraction and addition to the apt-get key ring, I get the following:

W: GPG error: http://ppa.launchpad.net hardy Release: The following signatures
couldn't be verified because the public key is not available: NO_PUBKEY
D702BF6B8C6C1EFD
W: You may want to run apt-get update to correct these problems
esj first-triad:~/open-vpn-config$

in sources.list

deb http://ppa.launchpad.net/network-manager/ppa/ubuntu hardy main
deb-src http://ppa.launchpad.net/network-manager/ppa/ubuntu hardy main

key retrieved

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: SKS 1.0.10

mI0ESXX0pgEEAMDSk9Vd+OWZNIa4dL2SpqFAjVq/hm4Nac2oc33g+BwP3jFajUC/quPnYXXl
N7GER+tTHJ9d0PlXQDoRxXFRdSjZYUHDkiT8UV1I+sTxkjDaA7uMXD4dEcL0SG0nh6OyHHrd
9PrWzIZ/jS6PsYtKrKwHYCvP/igPr5/bH1PQoyZzABEBAAG0IUxhdW5jaHBhZCBQUEEgZm9y
IE5ldHdvcmstbWFuYWdlcoi2BBMBAgAgBQJJdfSmAhsDBgsJCAcDAgQVAggDBBYCAwECHgEC
F4AACgkQJI3R7ryOv+h8JQP+Ib07jYEiNG3PZf22xkV2rU/ybI9s4fT1CCoPJq5V3uJmouUs
jtSXMD/9V44kFamw+Xq1EVEWeExfeABjaX7Vc9SR50Kl/DJVvBAbGs8rM2JxldQsl4sGWnTn
AMJx/fv4iQsdyaklS3TcK6xo1yL21C4j0wYsmNxS16F28L3hRQ4=
=8t/V
-----END PGP PUBLIC KEY BLOCK-----

thanks for any help