Both events sound like they're going to be awesome!! They both run 24 hours a day from August 1st - 3rd. (Around noon on Friday to around 5PM on Sunday.) They are only a few blocks from one another and they are running at the same time. Word has it that they will offer a discounted entrance rate if you bring your "ticket" from the other show.
DEFCON:
August 1-3.
Location: Tulsa Convention Center - 100 Civic Ctr, Tulsa, OK
(918) 596-7177
http://www.tulsadefcon.com - http://www.myspace.com/tulsadefcon
Tokyo in Tulsa:
August 1-3.
Location: Crowne Plaza Hotel - 100 E 2nd St, Tulsa, OK 74103
(918) 560-2225
http://www.tokyointulsa.com - http://www.cptulsahotel.com