Bottling my India Pale Ale on April 05/2009, how long will it last before it spoils? Ideal storage Conditions?

Depends on the amount of hops used. IPA's were originally made because when the English would ship beer to India it would go bad on the 6 month boat trip so they found that hops acts as a preservative so the more you add the longer it will last (thus the term India Pale Ale). I've seen people keep them for over a year as long as there is no heat or drastic temperature change, no or little light and it stays sealed or pressurized.