PS

I forgot to mention my favourite restaurant in St Petersburg. It's called Kat and it's Georgian.

The food was delicious, especially the cheese bread, known as khachpuri or hachapuri. One of my favourite blogs has a wonderful entry about Georgian food which mentions khachapuri, St Petersburg and Nigella Lawson. I cannot do better and so I refer you there.

http://www.travelerslunchbox.com/journal/2006/2/15/a-georgian-feast.html