Oh and a bit off topic, but just to mention that one of the other ‘guys’ is a girl… and after a few months of seeing her code, I think every team should be comprised of as many women as there are men (and be more diverse in general). It might just be her, but she approaches some problems in a completely different way to the rest of the team and her perspective has saved us from banging our heads against the wall many times. She also notices things that the rest of us are oblivious to. One day I'll get around to writing a blog post about it, haha.
In short, I would love to have the resources and time to train more people up from scratch – I never considered it before, it's all been positive so far. But, for most of the heavy lifting I'm still relying on either myself or freelancers. As for finding interns, I just asked around friends and family… it turns out there's a _lot_ of people that have thought about web development at some point but don't have a clue where to start – for some reason they thought they had to be good at maths or art.
Edit: just to clarify, they aren't interns… at the moment it's sort of informal class. We have a project that we work on over weekends (and a little bit during the week) . At the rate they're going, I would hire them in 6 or so months though.