#4 looks good. It gives me the opportunity to use the top half as an icon on some custom applications. Forgive my ignorance, but how difficult is it to create something like that in flash, 3D I mean, just for the front of the site, just curious.
Actually can you please try with different font and use the blue mentioned in my colours section. Also with the icon or abstract mark, can you make that square as I would like to use this in the system tray as an icon for a custom app. Thank you for the effort so far.
In regards to #24. I think the cube is a little off, perhaps try a flat square or even something totally different. Also try an uncommon text, not saying that was common just not what we had in mind, maybe it's the fact that it's too thin, if that makes sense.