My friend recently had his website - paradisesonline - completely disappear from the Google (not completely, it still ranks for it's domain name though). It used to be ranking for 'resort getaways' and 'hotels luxury' (in Australia at least). Now it's nowhere to be seen for these terms. It hasn't been blacklisted by the looks of it. Any ideas why this site has been slapped/penalized by Google? Could it have been dodgy link building?