As reported earlier, the new patch is now online for testing, on the Westfall server.
To try out the new patch, complete these simple steps.
1. Start -> Run -> Type 'regedit'
2. Press Ctrl + F, and search for 'Northrend'. Scroll down to the bottom and type the following:
beta.battle.net
-Timezonedifference from GMT-
Westfall (Beta)
For example, it should look like this:
beta.battle.net
-1
Westfall (Beta)
Save it and open Warcraft 3. From there you will be able to see the new realm. Enjoy!
Links
GosuGamers.net - 1.22 Patch notes
Battle.net - Patch Announcements/Updates thread
myMYM.com - Source