Well I don’t have Linkedin so that’s a shame. The idea is very good.
I expect if you use www.linkedin.com/i-do-not-have-linkedin as the URL Phil will let you in anyway.
My sentiment too: a nice idea worth supporting but the execution has something to improve. In addition to LinkedIn:
"All discussion is via a Google Group."
I expect if you use www.linkedin.com/i-do-not-have-linkedin as the URL Phil will let you in anyway.