The Onion A.V. Club reviews Sedaris' Dress Your Family in Corduroy and Demin and David Foster Wallace's Oblivion.
I think the review of Dress Your Family... was accurate; it felt like Sedaris was running out of material, to some extent. I'd like to amend that, actually. Sedaris may be running out of real life material, but he's proven himself to be a witty fiction writer with Barrel Fever. Those stories were some of the funniest I've ever read.
And as for Wallace... I've been meaning to read Infinite Jest for ages now and the only reason I haven't is because (a) I heard it's the type of book you either hate or adore and (b) it's over 1,000 pages.