OK, so with the posts here and the discussion in the dev meeting, looks like most people are into the N made up of tuning curves. To be sure though, here's a quick poll to compare the curves vs. the N, using the same font.
People mentioned that they didn't like the colors. I haven't thought about this enough to propose some alternatives, but for interest, here are a few variants of the N made up of curves with different color choices.
There are two decisions that I think would be good to vote on though! The first is the number of tuning curves in the N. I think 3 is the minimum. But maybe more would be better?
Then, there's fonts. I think it's pretty clear that serifs make sense for the general Nengo logo (though I have been thinking that in the Nengo GUI banner, the GUI could have a different font -- musings to worry about later). So here are a collection of serif fonts that I think could be good. If we end up going with the N made up of tuning curves, and there are a few fonts with multiple votes, I can make the Ns for them. But regardless, definitely pay close attention to how the Ns look in these fonts.
I limited it so you can only vote for 3 max, but feel free to vote for less!
Choose up to 3 options