wrzhost.com do operate out of the worldstream DC (for the next couple months before they move to TeleCity in Amsterdam - They're in the process of testing their new blade servers) however being a very large client of WS they can give you better deals on dedicated servers - and offer the same if not better service as worldstream and just to add:

Once they move - lets say you have a VPS with them, You'll be able to have up to 96GB ram, get dedicated bandwidth and have the reliability of the new NetApp SANs with snapshot backups and RAID 4DP (Only available to NetApp users currently).