I got my book in the mail today, it's awesome.
Jeph re-drew 9 of the original strips because he could not find the original hi-rez versions. On the first 2 pages, he includes the original low-rez versions and the re-drawn ones appear in order after that. The re-drawn comics are numbers 1, 2, 3, 6, 51, 64, 258, 259, and 260. Every comic has some commentary at the bottom of each strip.
In the very back, there is a short mini-comic that he gave away in 2004 at ConnetiCon - the very first con he ever exhibited at. The comic is called "Let's Go to a Show!" and is about Marten and Faye going to local indie rock show. This is the first time he has ever re-printed this comic anywhere.
Comics included are 1-299
That's about it. Good read.