There has been no decision made, on what kind of sub to use (again matching my point a)), but the xoops.org team has always signaled support, and a possible later adoption, once it is clear, what and how a Theme Forge would work, look like, etc...
So all is in the works, though as Depeche Mode stated in a song of theirs "It's a question of time..."
Oh, BTW some historic background:
There had been work done by a few members of xoops.org a while back, to create themes.xoops.org. Unfortunatly, and to me, for no apparent reason, activities halted, a theme repository opened on xoops.org, and the idea of a separate site dealing with themes for XOOPS was dropped.
Then the discussion started once again on xoops.org (please search for this, if interested, haven't got a link handy), at which community members again expressed desire for something like a theme forge.
There were many ideas, but never did a excepeted concept arise/evolve. As the need and desire was there, and also members claiming their interest and willingness to work and contribute towards the idea, Herko launched a mailing list.
The mailing list proved none efficient to get anywhere, so StudioC and I just created a site, to host a pre-XOOPS Theme Forge, IOW providing cyber space, to grow what we want. Once XTF members feel happy with what they have built, organisation efforts will concentrate on the going public of XTF.
There was the idea of having a public opening being accompanied by a contest, but that is just more work, which at this stage, is better not even contemplated....never the less, still in the back of our minds
Hope this info is of interest.....