Microsoft has confirmed an Xbox Live Arcade version of Wolfenstein 3D by listing it on Xbox.com.
Nerve Software, which ported DOOM to XBLA, is behind the conversion. Activision will publish, but the date is "TBD".
Other scraps of information are that Wolfenstein 3D will be one-player, run at 1080i resolution, and have an M for mature rating.
A price isn't mentioned, although a similar cost to DOOM - 400 Microsoft Points (GBP 3.40 / EUR 4.80) - would make sense.
Head over to our DOOM XBLA review for an idea of what to expect.