Blizzard Community Manager Kaivax today posted on the official WoW Classic forums that due to high demand they are adding a new realm to the list of US servers called Stalagg. The server will be available for name reservations (requires an active subscription) as of Wednesday.
Due to very high demand, we opened a new WoW Classic realm for name reservations at 5:00 p.m PDT (8:00 p.m. EDT) on Wednesday, August 14:
Stalagg – PvP – Eastern Time
We suggest that players, especially those on the Herod realm, consider creating characters on Stalagg. We expect that other PvP realms in this region will otherwise experience significant login queues when Classic launches.