wordpress site broken

Site is suddenly broken: d,i,a,n,a,b,o,[login to view URL] - check google cache for how it looked. This is a simple wordpress site (freshy2 theme) with a shopping cart (wp-ecommerce). The site version was upgraded earlier but suddenly the site does not display. I can login to wp but the theme and plugins are no more recognized - when i check with ftp all the files seem to be there. I need you within 4 days to : - repair the error and put the site online again, make it display correctly to html standarts and make it display same in all major browsers - make sure the shopping cart plugin is working properly - check all security issues (permissions, loopholes, etc) and harden the site's security I need reports on every step you take and if fast communication is needed out of RAC then meet on yahoo chat. Please say "dachpappe" in your reply so i know you read this.