6 wp sites hacked last night, all had edited themes etc, now completely fucked and filled with iframes to some russian sites. Hosting provider is being a bitch and my own backups are from months ago. FUUCCCKKK! Just needed to ventilate and remind people to do them backups. Do them now. Go do them already!
update wordpress (check via cpanel/fantastico for the fastest way), and then reupload the theme. you can also replace the fucked up files. usually it's index.php, admin/index.php and 3 or so files in the /includes dir
you're so right m8.... We usually run after making sites, promote them, monetize them and we forget that BACKUP IF ONE OF THE MOST IMPORTANT PARTS OF THE GAME I know how you feel cos the same has happened to me too...
you have a trojan on your pc, either the Virut or Virux variant. Cant be cleaned or quarantined, you need to nuke your pc and start again. Im serious, happened to me a week ago.