You can look at it the other way: lots of entrepreneurs aren't that strong technically. Some go out and try and learn, some try to find other ways around the problem - by partnering with tech people, for instance.
I've been a "builder" my whole life, terribly shy, no clue about sales or marketing or business, just glad that other people took care of that so I could get paid to do interesting work. For the last couple years, I've been doing things to get over the shyness, and have had a lot of success. Now getting learned up about business, because I want to own the thing I'm working on and have it pay the rent.
That's why I'm on HN. Looks like a lot of us here are doing that.
Varying startups require that someone steps up to the plate to perform a variety of tasks-- and for each startup, the needs are different.
You're looking for a formula and there isn't one.
http://en.wikipedia.org/wiki/Andrew_Tridgell
But he doesn't seem inclined to strike out on his own, even though something like Samba Inc. would certainly have a shot at making some money.
He is interested in superior technological solutions. He does not care about term sheets (aka term shits) or vesting rights etc.
He get paid VERY WELL for stuff he loves doing.
What is better than that????
BTW, he was ANU chess champion and often played blindfolded.
PS Australia's greatest hacker was John Lions.
hmmm ... if it's "au-hacker-fanboy-time" what about http://en.wikipedia.org/wiki/Damian_Conway ? Plus he's funnier ~ http://itc.conversationsnetwork.org/shows/detail880.html