Today I sat for the first time all the way through zazen in quarter-lotus, without any major pain or numbness! Yay!
It took about 6 weeks of daily sitting, first in Burmese (which I didn't really like - my right leg would always fall asleep rather badly) and in the last few weeks slowly working up to quarter lotus. I like quarter lotus so much better than Burmese - the way the ankles interlock feels so much more firm, and no more problems with legs falling asleep. My hips are still quite sore afterwards but every day it gets a little better.
Anyway, just wanted to let all the other inflexible people out there (I could barely sit cross-legged a few months ago) to keep working at it, keep stretching and sitting with discomfort as long as is reasonable, and eventually you do loosen up a bit!!
(Just in time too, I was dreading the Buddha's birthday retreat a little, now I can't wait)