Update January 2014: Links to documents at end of document restored.
We took our Poltava game to this year's Crisis. The game was well received we thought (at least it seemed there was nary a moment when there was not at least one person taking photographs of the game) though we did not win any prizes with it. Some pictures (among many others) can be seen on various forums:
Anyway, while there have been some rumblings and musings in the extended gamer group (all four or five of us :) ), we had fun on the day and we got two 18th century horse and musket armies out of it, which we intend to use quite a lot.
I'll leave you with two documents for the game: the (English language) handout and the list of cards (and thus the rules) we used for the game.