Omaha, Nebraska has at least 3 great beer destinations:
Nebraska Brewing Company (Code has been there) http://www.nebraskabrewingco.com/brews.asp
Upstream Brewing Company. Two locations with great beer and food. http://www.upstreambrewing.com/
Beer Corner USA. This is actually four interconnected beer places. The Huber Haus is an authentic (more or less) German beer hall. If you are into German beers they have all the finest ones. Upstairs is the Crescent Moon. According to Draft Magazine, one of the top 100 craft beer bars in the country. Next door to the Crescent Moon is Max and Joes Belgian Beer Tavern with an extensive list of draft and bottled Belgian beers. Since these are all basically different rooms of the same bar, you can get a beer in one and take it to any of the others to drink. Next door to all this is Beertopia, a package store with one of the finest craft and imported beer selections in the state.
http://beercornerusa.com/