If it appears to log you in, but gives you a white screen, try mediatransparent.com/wp-admin/options-general.php after that, and see if you can get some navigation back.
There is no definitive answer. There are too many variables to consider. Trouble-shooting is the only way you can work through it. You're also using WordPress Version 3.3.1, so who knows what doors not keeping up with WordPress security updates might have opened up.
This looks a little odd. Take a look at your cached page from the 8th:
page as it appeared on Jul 8, 2012 15:27:57 GMT.
It shows a ton of spam in the source. Here's what I see in the cached page from the 8th. http://pastebin.com/G7zQFWz4
Have you recently cleaned up a hack, or are you still hacked?