7-Zip 4.14 alpha:
http://www.7-zip.org/alpha/7z414a.exe

Installer source code:
http://www.7-zip.org/alpha/7zip.nsi

What’s new:

• 7-Zip installer was created with NSIS.
  Now it installs 7-Zip for all users (under Windows 2000/XP).
• Now 7-Zip can create multivolume archives
  (switch -v for command line)
• Some bugs were fixed
• New localizations: Breton, Farsi

Please don’t distribute that version. It’s only for testing.
You can write comments here about new installer and new version.