I've been anxiously waiting for 4G to get to OKC too. The most reliable information I've been able to get is mid-late 2011 at the earliest (but still likely).

I'm not getting the EVO or whatever the best phone at the time is, until we get 4G because you have to pay $10 every month extra even if the 4G service is not available. I also want to upgrade my mifi to 4G so I can get unlimited use and faster speeds.