Read my reports on .UA and .RU (use search). Ukraine is 48 mil population European country (1st by territory and 5th by population) with fast developing economy and internet. Don't forget about wide Ukrainian diaspora in Canada (over 1 mill), Europe (over 3 mil), Latin America (300,000 in Argentina only), Australia and NZ (over 100,000), etc. For the moment most of .UA domains are useless outside Ukraine if you are not planning anything Ukraine-related. .CO.UA is less valuable than .COM.UA. But it is a new zone and no one can predict what will be going on in a year or two.