The root of this problem is simply that there are a lack of blacks with technical backgrounds (of the high-level blacks listed in your post none of them had cs, engineering, or math degrees). If more blacks opt for technical training, the number of blacks in the startup community will grow. For those who do have an appropriate background, funding probably proves to be another barrier. All too many times, I hear of founders raising initial funding of tens of thousands of dollars from "friends and family." For obvious reasons, this is not an option for the majority of black founders.
If she's a part of the startup, then you all should spend time together working. If can work together as a couple(especially on a new venture), then you can probably last a lifetime. I'm sure French lessons don't last all day. Spend the evening as a date night. (I am female btw)
It's been on the xpmath site since 2003. If it doesn't seem legit please feel free to suggest that this post is deleted (I'm not exactly sure if/how I can delete it myself after an hour has passed)
I don't think the k-12 curriculum as it stands is optimized at all. Taking social aspects into consideration, I think at least two years could be shaved (so that students would graduate at 15 or 16).
Check Out "Mathematical Tools for Physics" by James Nearing (available as a free download at http://www.physics.miami.edu/~nearing/mathmethods/). It covers a lot of great results and is one of the most easy to follow comprehensive summaries of an undergraduate math education that I've come across.
