[Article] What the heck is 'Eastern' Europe?

" 'Eastern Europe' - Wrongly labelled" The Economist 7 Jan 2010. Here.

 Interesting article on how the already outdated idea of "Eastern Europe" has been further marginalized by the economic crisis. Specifically, a number of traditionally "Eastern" countries, like the Czech Republic and Slovenia, are outperforming "Western" countries, like Iceland and Greece.

Besides the economic limitations of the term, if Europe stops at the eastern borders of Poland, Slovakia and Romania, what then are the Ukraine, Belarus and Russia?