I think he will get another shot in the UFC, even if it's just prelims or Fight Night specials. But if he takes another loss following his performance at UFC 64, he's probably done in the company for the time being.
I was highly dissapointed with how he fought at 64 as well. I honestly had him pinned as being a big time player in UFC in a few years. Plus with a name like Cheick Kongo, it's easy marketing.