Thank you for your effort. Now everything is much better organized. 
I have had some doubts concerning participants list, as whether to include it or not, but eventually I thought that it represented festival biography... I have seen several wikipedia articles with long lists included, so I thought there might be a chance for it to stay there. We'll see.
I intend to create links to web sites of theatre companies (next weekend perhaps, if this article stays). Some of them can be found only in original language, you know, so if you don't know Russian, Bulgarian, or Greek it might be a little complicated to find them, although not impossible. )
I am glad you have already heard about this festival.
Best wishes, Lola User:Bi-ba-bo