I Agree With Grey Wing,
What sort of Ip address do you have fixed or static ?
Try turning you router off for 30 seconds then on again.
If your ip address changes disable proxies
and use a new ip address Every time you get banned.
( I cant do this any more, Got Virgin Now, They only give you a new ip address every 2 weeks )
Nominet bans at 1000
Google pr and yahoo links ( when operational ) are around 300
As long as your list is under 1000, do it all the way through then get a new ip ( or 2 )
to check for links and pr
Or
New ip around every 295 domains checked
Regards John