Are there any bus lines other than Greyhound that go from Houston To Dallas?|187259

Greyhound has gotten so hopped up and self important that they_re charging outrageous fees to go from Houston to Dallas. ($167 was the cheapest I could find. You could fly for that!) There is the UT bus, which is much less, but you have to either be a student or know a student, and I fall into neither of those categories. So another bus line would be really fantastic. Help?

I really don_t think there_s another bus company (that_s why the price is so high...no competition)
Megabus (www.megabus.com) is in the midwest and if that ever comes to Texas it would force greyhound to drop their proces.

why not fly? just wondering