There's CDMA also in nearby Romania, as well as in Belarus. But all those networks are rather ridiculous. The CDMA offer in Ukraine is nearly non existant (except the 450MHz one they use like in CZ), I almost couldn't find a single shop selling these phones and I suppose coverage is minimum too. Same in Belarus.
I guess you can find some info here:
http://sprintmobile.net/ and
http://www.idknet.com/