For those that have considered or already have an above ground pond here's a great site of someones own personal experience with having an above ground pond. She even lists her PROS and CONS on the matter. Some very important points that she lists that I'm sure everyone wants to read are her "If I had it to do over note".
My Above Ground Pond/My WatergardenFor those of you who still haven't made up your mind about whatkind of pond to build I would like to tell you a little bit about mine,and how it is to live with this kind of pond.
Priscilla's Pages: My Above Ground Pond