I used to live in Omaha and you should have no problem getting tiks for a game. Specific tickets for an attractive match-up with two teams that travel well could be probematic, however you can go to Rosenblatt and buy from a scalper....For a typical match-up not too pricey......
or
NCAA Men's College World Series 2010
Tickets Reserved Seat Tickets
There are approximately 17,000 reserved seats in Rosenblatt Stadium.
Reserved seat tickets are for specific games. Holding a reserved seat ticket guarantees you a seat at the game. Reserved seat tickets are those marked with the letters on the
stadium map. To enter Rosenblatt with a reserved ticket, use the main entrance on the southwest corner of the stadium.
General Admission (GA) Tickets
General Admission (GA) tickets are
non-guaranteed seats in the right outfield and left outfield bleachers. The approximate capacity is 5,400 for these aluminum, bench-style seats with seat backs.
GA tickets are not designated for a specific session or date and these seats are available on a first-come, first-serve basis. Gates open 2 hours prior to games. As long as the ticket holder arrives early enough to be seated, the tickets are good for all games, including Championship games. If filled to capacity, the gates will close. Gates may reopen after a few innings or ticket holders may watch the game on the large-screen TV in the plaza area.