I'm fairly positive I'd read somewhere (perhaps on Jan Svěrák's site?) that the English dubbed version will probably be released on DVD sometime this fall. But don't quote me on that. ;o)
And yes, the book will be translated into English. That was mentioned on the blog back in June:http://amanita-design.net/blog/2010/06/13/kuky-se-vraci-book/
And Jakub commented very recently on the blog and said, "I don’t have much info about printed [English] version yet but the digital version with illustrations should be available soon."
So the printed English version is still in the works. =o)
Edit: English version fell through, sadly. :'(