An installer should definitely be part of the roadmap. There are many initiative but really a decision should be made by OCT soon, IMO. TOO much time is wasted by community members solving installations (automated or not) on their own or discussing it on the forums. Potential developers and users are chased away. There may be some funding for this installer, as far as I understand, so OCT please discuss or better decide.
I'll throw in another interesting approach: InstallBase or Bitrock.
InstallBase (TK based with BSD license):
http://installbase.sourceforge.net/screenshots.shtml
And maybe get its major developer Damon Courtney involved?
"About: InstallBase MPI is a multi-platform GUI installer designed to work on Windows, Mac, and virtually any flavor of Unix/Linux. Using a full-featured, easy-to-use install builder, it builds a single binary executable for each platform that can be easily distributed without any other third-party ibraries or applications. The install is entirely self-contained."
"Each pane of the install can be completely customized, right down to the actual code that creates it."
Bitrock (if it suits the need). A proprietary product but with free licences for opensource projects:
http://www.bitrock.com/buy_opensource.html
Links on the side:
http://tcl.projectforum.com/tk/Home
http://vtcl.sourceforge.net/
http://tkdesk.sourceforge.net/