The official release announcement & release notes are still awaited.
ALT Linux supports English along with Russian language. To select English language on ALT Linux Desktop 4.0, press F2 & then select the 3rd option from the top.
The ALT Linux Desktop 4.0 offers KDE 3.5.7 in the base system & Gnome 2.16, Ice WM 1.2.30 in contrib. (thanks to gvy for this info)
ALT Linux offers an English mailing list at Community-en Info Page
ALT Linux Bugzilla page with English language support at Bugzilla Main Page
Here are quick links for the ALT Linux Desktop 4.0 DVD
1: Main Link for Download: dvd4.iso
2: Mirror link for Download: dvd4.iso
Torrent for ALT Linux 4.0: ALTLinux Desktop 4.0.0 i586 dvd4