I know this question has already been asked in many ways, but I'm looking for a more general answer.
I'd like to know which is the best place to find technical people to work with. Has anybody out there been rally successful using only the Internet, or is joining a "meetup" a better way? Are there other alternatives? (I'm in Europe BTW, not in the US)
Look at open-source projects you really like, figure out who coded the majority of it, and recruit that person. Finding a cofounder isn't about interviews and having people find you. You are going to have to network, meet lots of people, and recruit the person you want to go into business with you.
To get a real cofounder who will stick with you through the good and bad, a few things need to line up:
There isn't a perfect place to find a hacker who needs a hustler. Most of it is happenstance, but you can increase your chances by attending hacker-related events. I hear at least one person a week looking for a "technical cofounder" and I rarely hear technies looking for a "non-technical cofounder".
You're going to have to work hard to find someone awesome. Don't settle for a B-list cofounder. Hold out until you find the right person.