Does one have to hold a tenure-track position to deliver a paper at the MLA (comp lit field)? Can one be an adjunct or VAP?
Absolutely not. I delivered a paper at Chicago and I am a grad student.
Other than that, I do not quite like the MLA that much. I prefer other conferences, the MLA is too big, too depressing and people (both grad students looking for a job, and professors) try too hard to impress their peers.
But Chicago rocks, anyway.