I listened to the first five minutes or so, and enjoyed it. However, I was looking over the score... As a cellist, I'll disagree slightly with oboehazzard and say that in some instances, triple stops are sustainable, as long as at least one note is an open string. But, typically, one would roll the bow across and split the chord. And, like manossq said, most of the cello chords are quite playable, but not necessarily ones you'd want to play. Any piece with six flats in a pain, anyway. M. 48 is the only impossible one I see, glancing through quickly, as manossq said.
I'd also be happy to offer my assistance for cello orchestration, along with manossq's, if you ever want it.
Actually, probably what I would do, if you wanted to have those chords played, is divide the part between two cellists.
I look forward to hearing more!
David G.