My mate works at Sitepoint (as a technical book editor) and managed to twist my arm into writing a developer guide for the JSTL.
http://www.sitepoint.com/article/1243
If anyone has any comments or ideas about how it could be better I'd be interested to know. Also, if you want to learn about the Standard Tag Library in Java you can read it for that reason too
And yes, that is me in the hat