Google’s Squidoo knockoff product Knol is now open to public use after a less-than-spectacular introductory phase, so they’re making a particular appeal to authors to take advantage of the service: “Knols are articles about specific topics written by authoritative sources, so if you’re an author, writing a knol is a great way to raise the profile of a topic you care about. “Let’s say you’re an author who’s a gardening expert. You could write a knol on how to tend roses, which could introduce a few general principles of gardening and then explain how to care for a rose bush. […]