Here are some websites set up by people who are resident 12 months of the year.

www.digitalibiza.com

www.ibizatravelshop.com

www.ibizaspotlight.com

http://www.ibiza-hotels.com/

http://www.spainted.com/ibiza/

http://www.people-of-ibiza.net

They will all give you a good starting point to plan your visit, and have been established for many years.