Thank you for all the prompt entries! I've rated them all so you can see what we like so far. We do like the dark background theme. A couple of comments for improvements are below:
1) We want to stick with lower case 'ii', so the letters are clearly i's and not lower case L's.
2) Can you all please update your designs to use lower case ii's though?
3) Remember the magnetics theme - if we could do a play on magnetic flux lines on some of the letters (M, A, or between the ii's?) that would be really cool...