The US Cyteen audiobook: http://www.audible.com/pd/?source_code=ASRDG0001WS041112&asin=B007IJQ6U4
The UK Cyteen audiobook: http://www.audible.co.uk/pd/?source_code=ASUDisc1Bk0001WS041112&asin=B007IVZ9HS
The Cyteen set is professionally produced, beautifully read, unabridged—it’s the one I’ve had a chance to listen to at least the start of—there are 5 sections, averaging about 7 and a half hours per section, so you get a lot of car-trip listening. And if you buy through these links, I get a dollar, besides the contract.
To find the audible books, go to audible.com and search ‘cherryh’ in the provided blank. All are unabridged. Read the accompanying text closely and pay attention to the set and sequence information: Foreigner has a lot of volumes.