Nobody mentioned пирожки, this has to be a national закуска!

When I go to a party that's a potluck, I like to make them even tho they are labor intensive. But yummy!

Here are some places you can find good stuff--
http://www.ruscuisine.com/
http://www.cooking.ru/
http://www.recipesource.com/ethnic/euro ... exall.html
http://www.russianfoods.com/recipes/view/default.asp