Ok, this topic seems to be getting quite some interest. Ill give you a tip if you REALLY want to try.
First things first.
The FCC implemented high frequency signals of FM so that one station in one locale would not interfere with that same station in another locale. FM signals are thought to only reach the horizon because the frequency it resonates at passes right through the ionosphere.
These frequencies are those above 30Mhz. That is why AM is easy to get from long distances with fandangle antennas and cannisters and BS like that. This stuff isn't really gonna help you with FM. Actually all you really need are a couple bunny ears and a WHOLE LOT OF PATIENCE.
Things the FCC didn't expect was weather. They based there studies on normal weather patterns. Especially not anything going on way up in the ionosphere. Well sometimes of the year and even day something happens up there (don't ask me what, im no freakin' scientist, im lucky i know this much) and the ionosphere will occasionally reflect FM back to the earth. This basically giving it an infinite distance around the earth. As long as it keeps hitting these spots.
Another thing is certain weather. Something about fronts and temperature in the air doing strange things. Its again not common but occurs daily for moments. These occurences will also send FM signals off farther then usual.
Now the problem, first its not stable. It only occurs every so often. Also you have to sit there and fiddle with the FM tuner back and forth in micro movements along the station you want. Its nice if you have a digital tuner like on a really expensive stereo. It is kinda like in ham where it gives you the frequency followed by .005 and you can raise it up and down. Well these very minor changes will pick up signals further away. (the wave kinda vibrates as at travels further, staying fairly close to the original just with a very minor error. same reason why you will hear 98.7 on 98.6 if your stereo let you go there.)
So in conclusion, YES, you can do it. If you want to. But you will constantly be fiddling with it every time you go to tune in cause it is going to change slight frequencies hour by hour. That and it will only occur at certain times of the day.
One more big problem is, is that the frequency you want (89.7) is a low side FM signal. Its a much more durable frequency (lower frequency reflects much better then higher frequency) so if your omaha station happens to bounce your direction one day you are going to have to shuffle through all the stations similar in frequency between you and omaha. Its hard work, frustrating as all hell, and the quality is just not worth it.
Oh, if you try, play it in mono... you can distinguish the sound much better in mono I have found when I was little.