I'm working on this shapes since 2 months, and I really need your mind now...
(don't think there is grey in this image, that's only proud and honest black) 
Superb work. Very original. I'm not a fan of the trend towards teeny tiny fonts on web pages, but this one proves that it's possible to make something beautiful out of just a handfull of pixels.
Now that it has been pointed out, those V and W stresses look wrong to me, and I think I'd prefer it done the normal way.
Wow, that's a beauty!
The only other comment I'll make is that the u&lc V and W (and to a lesser extent, uc Y) look backward in their stress. Was that intensional, to have the heavier strokes on the right side as opposed to the more traditional left side?
It does add an interesting quirk, so I'm not entirely sure that it's a bad thing.
Thanks a lot for all your comments and consultings!
I've changed the Uc V and W cause it was not intentional (thanks David!) and it works better like this; and made a wide version of the Uc.
I work on kerning settings now because fixed letterspacing doesn't work.
The five last chars VWXYZ are really refractory to the grid constraints so they seems strange in the reg and wide version: I'm waiting for a pixel miracle. 
Captured from web.archive.org on 24 Apr 2015. view this capture