Core 77

http://www.core77.com/

Since 1995 Core77.com has served a devoted global audience of industrial designers ranging from students through seasoned professionals. Core77 publishes articles, discussion forums, an extensive event calendar, hosts portfolios, job listings, a database of design firms, schools, vendors and services. Core77 provides a gathering point for designers and enthusiasts alike by producing design competitions, lecture series, parties, and exhibits.

Core 77 is great networking website that i have use before on a numerous occations, I find the site to be very useful on all things product design.