IBM AIX 5L - General overview, standard software environment, recommended web sites and books for users and administrators. - http://www.osdata.com/oses/aix.htm
Tek-Tips: IBM: AIX FAQ - Categorized questions and answers, covering areas such as commands to perform specific tasks, disk management, and troubleshooting. Answers are rated by users. - http://www.tek-tips.com/faq.cfm?pid=52
AIX : FAQ - A series of answers to specific technical questions, in no particular order. - http://www.unixguide.net/ibm/faq/
AIX FAQ - 5-part FAQ from the Usenet group comp.unix.aix - http://www.faqs.org/faqs/aix-faq/