I have had to store mine (use Flightpower) for some time since my son was born at the end of 2008 with minimal uses to say the least. I have just kept an eye on the voltage per cells and kept them balanced with a charge on them and they seem fine now that I have more time to run my stuff.

Brian is the man on this stuff, so suspect as usual he is right on the money, if they are holding a charge, will balance and no signs of puffing they are likely fine. May shorten the life of them, but only time will tell. Just throwing in my 2 cents so you know you are not alone, happens to the a lot of us. Congrats on the nuptials!