Hey
Thanks a lot for sending me your comments.
In the meantime I contacted some companies from OpenACS list and asked them similar questions. I have to admit that only some smal % of them gave me reply.
I also contacted some companies in Poland which claim that they are providing KM internet tools. I'm aware that OpenACS is maybe not exactly KM tool, however none of companies gave me a reply. It means that OpenACS is completely new topic for Polish entreprises and programers. The best prove it that I found only one company in Poland which is providing OpenACS solutions for their clients.....
If you have any other comments, inputs, suggestions, I'll be more than happy to read them!