Last week about 40 Foundry Group portfolio company CEOs and founders converged on Boulder for a half day of meetings followed by some social time. It was a truly amazing experience and such a great reminder of the importance of cultivating a peer group for you and your company. We have a very active CEO and founder mailing list at Foundry, where there are daily rifs on any number of topics and where portfolio companies can reach out to each other for help and advice (we have a separate list for CTOs, one for Boulder companies and another for Bay Area companies as well – all designed to build Community – with a capital “C” – around the shared trait…