Like to poll your colleagues and friends for feedback on your new project? Sometimes those in your circle - or their friends - may have helpful insights or contacts. Like others at SpeakerNet, I’ve found the LinkedIn approach to connecting with my “network” is helpful for several kinds of research. Plus (and this was vital to my choice to participate) LinkedIn’s design weeds out those annoying sales pitches and meaningless “hellos” that pseudo friends tend to send on some sites. Founder, Reid Hoffman tells a Stanford University audience some ways to use the site. Peruse more reasons to link in, offered by the Thinking Home Business blogger and Guy Kawasaki.