Right. I encourage you to use any public article on this site in your posts, mail, sites, reports, articles, products. Heck, get all the patterns on this site, slap them together into a PDF format and give it as a FREE bonus for your product. Or, sell it as YOUR product. Just don't modify them and keep the link to this site.
Here are the gory details. Every page on this site that is not password protected is published under Creative Commons Attribution-No Derivative Works 3.0 license. This means that as long as you don't change the borrowed text and provide a link back to this site (keeping that (cc) notice at the end will work fine), you are free to use it wherever you want including for commercial purposes.
See that gray blob on the right with big CC letters? Click on it for the full text of the license.
Still want to do more with these posts? Ask.