I tried my hand at flat design, I'm no designer though


Like that one too.
Maybe you can try to make some variations ?
Using the same style, maybe adding an "S" or something with "HYP".
Current my votes :
1 Logo 4
2 Logo 3, I like it has H and S, would nice to see how it looks in different color schemes, and some depth to it.
No votes for 1 and 2, sorry, just don't like it regardless of color scheme.
Since a logo has to last a lifetime I think we should not rush this one.
The userbase is growing fast and the more ppl we have on board the more ideas or designs will show up.