site doesn't work for me, same message that it is down did the address get changed?
If you are on windows, start->run-> "ipconfig /flushdns" (without quotes) and then in your navigator press Ctrl-F5 in bitcoin.cz page to reload from site and not from cache
nope didn't work, could it be that i'm in firefox? and your english is fine

I used the same process in firefox and it worked for me. You can try this:
1) At the top of the Firefox window, click on the Firefox button and then select Options
2) Select the Advanced panel.
3) Click on the Network tab.
4) In the Cached Web Content section, click Clear Now.
EDIT: I just goggled it and pasted it here. For my version of firefox I have the menu bar enabled and options is under the Tools menu.