Where can I meet like-minded people interested in solving the same problems as me?
I've met co-founders and team members through participating in Startup Weekend evens. (The last two companies I sold were started at startup weekends!) But, I generally recommend participating in others groups or pitching different ideas than you're trying to find a co-founder for.
Another great resource is FounderDating.com Just remember, don't think of it as speed dating... Think of it as Match.com and trying to find a lifelong partner.