yeah.. i agree with keeping them in a cool dry place with no direct sunlight.. you can also add in a couple of silicon packs to suck up anykind of moisture.. take out the silicon packs every month or so, and replace with a new one.. let the old ones dry out for a couple of days, or a month, and just keep changing them out with each other..
seeds can last a very, very long time and still be viable aslong as you do everything right.. i have heard that a fridge isn't the best thing as it may add some moisture to your beans, but i would think that there must be a good tip for storing seeds in the fridge without the moisture getting in with the seeds..