All of the Russian and Ukrainian restaurants, food stores, bookstores, video, etc. I know are not in Chicago but in the north and northwest suburbs.

There are large Russian populations in both Skokie and Niles.  I am told that most Jewish Russians and Ukrainians are afforded housing in these towns upon arrival and then once they have made some money they move to Buffalo Grove, again a large Russian/Ukrainian population.

A Russian restaurant (all signage inside the establishment is in Russian) is called L'Mirage in Rolling Meadows.  I know, sounds French but there is nothing French about it when you are inside.  Another in Buffalo Grove called L'Ermitage was recently busted (within the last two weeks) as the owners are accused of laundering money.

My wife and I generally go to the food store Alef in the Mundelein/Diamond Lake area for Russian/Ukrainian foods.

There are many Russian/Ukrainians all over the Chicago suburbs that you will eventually discover.

Good Luck!