==Puscifer==
[[Maynard James Keenan]]'s side project, Puscifer, has 2 officially released songs: "REV 22:20" and "The Undertaker (Renholdër Mix)" on the ''Underworld'' soundtracks. A remix of the former, "REV 22:20 (REV 4:20 Mix)" by [[Charlie Clouser]], was on the ''Saw II'' soundtrack. Further work is in progress with [[Danny Lohner]], Lustmord, and others.
==Queens Of The Stone Age==
Queens Of The Stone Age opened for NIN during the autumn leg of the [[With Teeth arena tour]]. [[Dave Grohl]] has played for both bands in the studio. Reznor has provided guest vocals for QOTSA's 2007 record, ''Era Vulgaris.'' Unfortunately, the song, "Era Vulgaris" is not on the US edition of the album, but can be found as a bonus track on the European and Japanese editions of the CD. Josh Homme later stated in an interview that Reznor recorded a song with him for use on the album ''[[Year Zero]],'' but the song did not make it through to the final cut.[http://www.billboard.com/bbcom/news/article_display.jsp?vnu_content_id=1003549969]
==Tweaker==
[[Chris Vrenna]]'s electronic/jazz project Tweaker performed the ''Doom 3'' title theme instead of NIN. Tweaker has 2 full-length albums, with a new one set for 2007.
==Queens Of The Stone Age==
Queens Of The Stone Age opened for NIN during the autumn leg of the [[With Teeth arena tour]]. [[Dave Grohl]] has played for both bands in the studio. Reznor has provided guest vocals for QOTSA's 2007 record, ''Era Vulgaris.'' Unfortunately, the song, "Era Vulgaris" is not on the US edition of the album, but can be found as a bonus track on the European and Japanese editions of the CD. Josh Homme later stated in an interview that Reznor recorded a song with him for use on the album ''[[Year Zero]],'' but the song did not make it through to the final cut.[http://www.billboard.com/bbcom/news/article_display.jsp?vnu_content_id=1003549969]
[[Category:Related to NIN]]