I like the images that the GnuCitizen group
use for all their sites but it probably would
be a good idea to create a smaller logo
that can be put onto websites as an affiliation link.
I also like "big white reflecting text", it is simple.
But I just made one simple logo. It is composed from letters HoH, one 'H' for black hats, one 'H' for white hats, and it can symbolize house;-). It has one major drawback - it can't be used on black background. (Aside from that it is possible that this kind of logos are quite common, I don't know, I am not logo designer.)
It depends how you look at it. If you see cube, then reflection is wrong. If you see 2D "card", then it's good;-). I made one with "3D" reflection and black background.
Mate, I am graphics designer and that looks fine to me (black background). Shrunk down, with houseofhackers.ning.com beside (alternate colors per section of url), would be fine for a little badge or similar. Would of course need to be done more hi-res than what you have there, but very easy to do. ;) talk to PDP about it.