[martharotter]

Networking & meetups are great, as mentioned. I am also seeing a lot of people on good tech mailing lists start to reach out as well for co-founders.

Groups like NY Tech Meetup (http://www.meetup.com/ny-tech/), SF New Tech (http://www.meetup.com/sfnewtech/), various regional founders groups on facebook are all places I've seen people connecting to talk about working together on startups.

I don't know how useful it is, but I've also heard mention of Founder Dating (and there are regional meetups for those as well): http://founderdating.com/ Good luck!

[georgeallen003]

Another great suggestion, I am thoroughly impressed with the feedback. I had not heard of founderdating before, I will check it out too.