Perhaps the first online group read of the novel was the "National Reading '2666' Month", a month-long reading by The New Yorker (The Book Bench) in January 2009. Started in the same month, but running until May, was a reading by bolano-l Google group. The reading was organized by Matt Bucher. After that, there were several more online group discussions, mostly from blogs and reading sites.
Other reading includes the one I posted earlier (over at Leeswamme's Blog).
Below are sets of blog links to two sites whose commentaries I've found useful in understanding the five-part novel. They provide a close reading of the text and appreciation of the nuances of the book's style.
Update: New readalong at The Weblog.
from Caravana de recuerdos (in Spanish and English)
Richard's blogging was part of a group reading back in May 2009.
4.1 The Part About the Crimes
4.2 The Part About the Crimes
4.3 The Part About the Crimes
4.4 The Part About the Crimes
4.5 The Part About the Crimes
from Las obras de Roberto Bolaño
Last year Matt Bucher, Maria Bustillos, and others read the 5 parts over a 15-week period, roughly 50-70 pages a week. There were several posts per week, broken into several themes (such as dreams, characters, vocabulary, deaths, and locations).
The Part About the Critics
Week 1: pages 1-51 [post 1, post 2, post 3, characters, dreams, timeline, locations, vocabulary]
Week 2: pages 51-102 [post 1, post 2, post 3, post 4, post 5, dreams, characters, locations, vocabulary]
Week 3: pages 102-159 [post 1, post 2, post 3, post 4, dreams, deaths, locations, characters, vocabulary]
The Part About Amalfitano
The Part About Fate
The Part About the Crimes
The Part About Archimboldi