I cracked SC2.exe/SC2Editor.exe so you can test the new beta already without live servers.
SC2Editor.exe goes into the Support folder and the SC2.exe goes into VersionsBase15976. Don't forget to make a backup of both files so you can play once the servers are up.
When you start the SC2Editor and the nag screen occurs which asks you to login, press no then you can use it without any problems.