Not only BBW has St. Petersburg, but now there's a freeware version of the game. Look at boardgamegeek for the link and how to install the English translation overlay.

There's also some heady analysis of the game now, but so far it's only available in German and French.

The power curves and game length are really balanced for the 4 player game, with average scores clocking in around 40-70 points. But if you play 2 player, we usually fetch over 200 each player. You'd expect 2x the average 4 player score, but instead you get 3-5x as many points thanks to the different power curves at work.