I just had to get this post up after today. We’ve been doing work for a guy for about 2 years now on one of his websites.
Anyway we get in one morning and his site has been hacked, all the main content had been replaced with some javascript that loaded an iframe. He asked if we could sort it out for him so we got in touch with his host.
Their answer is, they dont do backups of customers sites but they’ll send him a guide on how to backup his own site in the future! So he’s lost about 100 pages of unique content that he sat and wrote up himself.

So never ever, ever, ever, ever even think about not backing up your website as the consequences could cost you dearly. If you’re using wordpress here’s a nifty backup tool that will automatically backup your wordpress website and email the backup to you. http://wordpress.designpraxis.at/plugins/backupwordpress/