Some of the Tutoriols I've found on the net.

http://abduzeedo.com/creating-crazy-cool-logo

http://www.digitalartsonline.co.uk/tutorials/index.cfm?featureID=1691

http://www.myinkblog.com/2008/08/10/design-with-swirls-and-flourishes/

http://vector.tutsplus.com/tutorials/illustration/how-to-turn-glasses-into-a-great-geek-icon/

http://www.vectordiary.com/illustrator/illustrator-tutorial-the-perfect-diamond/

http://layersmagazine.com/blueprint-style-text-in-adobe-illustrator.html