That site is there, but broken. It generates 13 lines of output (use View Source), and then crashes without generating any visible output or any error messages.
This is most likely caused by a bad plugin, incorrect versions of PHP or the data base, or a hacked site.
One must enable debugging messages to see where the problem really is.
@dannyac: please confine issues with your sites to the forum and not use direct emails. This will get more eyes looking at your issues.