I have drawn and corrected many buildings in Odessa some months before. Not very difficult for me, I teached 15 years konstructive geometry on the university.
( You know probably my page: http://wiki.openstreetmap.org/wiki/Roof_modelling )
Now, some friends of me asked: may we help with mapping building one or 2 days in one area in Ukraine?
If yes, please tell me, where.
I would offer Ivano-Frankivsk (Iwano-Frankiwsk, Stanisławów) and Zhovkva (Żółkiew).
There is good bing coverage for both of them.
We are also allowed to use Yandex-Panorama pictures(but not to copy map data) to map housenumbers and POIs: http://maps.yandex.ua/-/CVfVyL~C. But I would not map POIs since pictures are quite old(few years old). I think presence of POIs should be checked locally.
Hello Marek! I posted answer almost at the same time as dudka, so I was sure that my answer had been given first. It’s fair to work on dudka’s suggestion. If you’ll have time for Чернещина, you are welcome to use my idea in future. Thank you, guys!