If you know interesting sites of symphony orchestras, please tell here about.
Now I want to present the link: www.kso.org.ua
The official site of Kharkov Symphony Orchestra.
There are some info about orchestra work and MP3 recordings

The Kharkov Symphony Orchestra "Slobozhanskiy" is a young, dynamic organization that welcomes the possibility of new and interesting projects. The KSO is open to offers of collaboration, whether it be touring opportunities, recordings, soloist accompaniment, etc. Producers, managers, promoters, and directors are invited to submit their ideas to the KSO.