One for All Cap
This cap will fit anyone, with any needle size and any yarn! It is knitted top down, and you can adjust the size as you go.
The pattern includes tips for the cast on method, some sample caps in plain stockinette and in ribbing, and a chart for a flame cap.
Update 1/16/13: It seems Google Docs, where this pattern has been hosted, is not functioning properly and the pattern is temporarily unavailable. Worry not, this pattern will become available as soon as possible as a ravelry download. Thank you, everyone, who pointed this out!