I just wanted to add that you do get park hopper privaleges with an AP, without additional cost.
Something you might want to consider: I *think* an AP becomes cheaper than a regular (no add-ons) MYW ticket at 11 days. So, consider your WDW vacationing habits. We take one trip per calendar year at 8-9 nights each and make sure they fall under the same AP. Last Sept & this May will be under our last AP (a total of 19 park days, and under the old park hoppers pay off was at 8 days). Next trip is Dec. 2006, so we'll purchase new APs then and should be covered for 2007.