Update by a new photo in the article
Ice is ready in one of the main Bohemian ice climbing area Oldřichov in Jizerske mountains (close to  Liberec), according to the reader´s discussion (Forum) in Czech version on www.lezec.cz . 

But a reader reported that the ice is quite thin and the last weekend it was a rather crowded there. More beta about the area and about other ice climbing possibilities in following articles:
Jizersky Ice
Ice climbing around Prague

Look at a actual photo from Oldřichov:

(by Petr Jandík)