It seems that plans are in the works to build a Victims of Communism Memorial in Washtington DC. Unfortunately, it won't have as prominant a location as many of the other memorials, but at least there will be something.
This column in the Wall Street Journal Opinion section details several other sites around the world, as well. I think the most interesting tidbit is the mention of how quickly many in Eastern Europe switched from Fascist to Communist at the end of WWII. Those two may seem rivals in ideology, but are certainly not so in practice. They simply seek to control people using different propaganda. But the goal was always the same - domination through oppression and fear.
Quick poll: If you haven't hit the link, do you know how many deaths have been attributed to Communism?
The Communists clearly out-classed the Fascists in death-toll category, partially due to the longer term of widespread "success."
But of course, let's not forget that Communism is all about equality, even if as George Orwell so astutely pointed out in Animal Farm "All animals are equal, but some animals are more equal than others". Many will tell you that Communism's 100 million death toll only "happened" because it hasn't been done right, yet. It really is a good and wonderful theory (in the non-scientific definition of the word). Never mind that it's antithetical to human nature, and any such system can only be implemented through - guess what - oppression and fear.