It looks like the next season is the last. And on the one hand, it really sucks, especially since they don't even rerun the show regularly anymore. But on the other hand, I really think if there was a time to end the show, it's now. Character arcs are closing, there really isn't too much more they could do with some of the concepts without it becoming hideously repetitive. I just hope this decision gave the writers enough closure to end the series on a high, satisfying note, rather than an annoying "the adventure continues" or some other unsatisfying abrupt end.