Google is your friend. I’ve spent a couple of weeks e-mailing the people who host my website to get a copy of my database back. It turns out that they had one. Then by the time I asked them to restore it, they’d over-written it with a blank one. So I lost everything.
But then I found that Google’s Reader had a copy of everything. So I’ve saved it in a file and will have a go at putting some of my old posts back. Well done Google.
Oh, I’ve also found out a lot more about security. No idea whether I will ever be able to stop someone hacking my blog again. However, I have now got an automatic back-up facility that saves a copy of my post database every week.