For what it's worth, some online comments seem to indicate that the Bellevue, Nebraska LUM'S does not have the old signature food items like the Ollieburger, etc. on the menu. It is just another local "greasy-spoon" diner.
I wanted to bump a LUMS thread and this one seemed to be the most recent one around, so here it is.
I ate at the Bellevue, Nebraska LUMS on September 1, 2012, so yes its still open and still looks like the 70s inside. It was funny; at 12:30 PM on a Saturday it should have been busier than it was but after the older couple that were there when I arrived finished and left, I was the only one there for awhile until some more customers arrived. The waitress was very nice and didn't seem to mind me snapping a few pics while I waited for my food. It really, truly is unchanged from the "glory days" of LUMS, at least in its decor. The dark wood beams and railings, the central row down the middle with booths on either side, the red vinyl seats, even the rear-corner second entrance door... All just like every other LUMS I'd ever been in. They still had a few of the hanging stained-glass LUMS lamps.
The menu was much longer than I'd remembered. My most-recent LUMS experience prior to this one, in White River Junction Vermont in 1993, still featured the original LUMS menu; even the illustration on the cover, a montage of smiling happy people, was still the same. This Bellevue LUMS now had its own menu, minus the 1970s-era pictures, and a lot of items had been added, like various ethnic items and ribs. No Ollie Burger. I did have however the LUMS Club sandwich and it was quite good.
In retrospect I should have asked for a "To Go" menu (they had a rack of them). But I'm happy to have had a chance to go back to a place I'd eaten at many, MANY times as a kid.