As part of the bolano-l group read of 2666, I've started a Characters & Reference document to help keep track of major and minor characters.
View the 2666 Characters and References document
We've only just started, so it's not too late to join in!
Also, here's a quick interview with Natasha Wimmer, who was the translator for both 2666 and The Savage Detectives.
And here's an article in Time that lists 2666 as the best book of 2008.