The single best critical text about Infinite Jest has been released! Elegant Complexity
, written by Greg Carlisle, is an outstanding resource for both first time readers (there are very little spoliers if you read it along with IJ) or for those people who have read this wonderful novel numerous times. I rarely get this excited about releases (apart from DFW's stuff), this is a seriously good investment.
I was able to read a draft earlier this year and I was surprised by the number of times I discovered something new about IJ. I had the impression I knew the novel pretty well!
Disclosure: I know Greg, and have read a draft, and yes, if you follow the link to amazon I'll get commission through the associates programme. This is the best analysis of IJ, it is a must have.