We spoke to Trader Joe's at the time and they told us they planned 18 months in advance. There were no plans for a store in Idaho Falls in that window. That means you'll have to get your Two-Buck Chuck from your friends or relations or hit the road for California, which is never a bad idea.
Nothing has changed since then, but for those of you who can't let go I want to offer you this link I found: http://www.traderjoes.com/stores/coming-soon.asp.
And here's a link to a review of the best and worst of Trader Joe's, which I found entertaining: http://www.thedailymeal.com/best-and-worst-products-trader-joes/4472/comment/reply/21182?utm_source=Outbrain