I've been waiting for Dung Gia (on Northwest Highway in downtown Des Plaines; technically 1436 Miner Street) to open ever since I saw the "coming soon" sign. To my great surprise, it turns out that the proprietors are from Annam Cafe, which was one of my favorite lunch spots when I worked in Evanston. Last night, we enjoyed an excellent spicy squid salad, an appetizer combo platter and lemongrass chicken.
Of course, the menu is not as extensive as one would find on Argyle Street and the prices are not quite as low, but the food is solid and fills a huge void since there are virtually no Vietnamese restaurants nearby (and barely any in the suburbs at all). After two really terrible experiences at Tay Do in Glendale Heights, I had given up hopes for decent Vietnamese food outside of the city limits.
Located across from the Des Plaines Metra station, it's pretty much a bare-bones storefront, so don't be expecting a suburban version of Le Colonial or Pasteur! But the food is fresh, tasty and cheap.