Lockhart's Lament was discussed here earlier this year: http://giftedissues.davidsongifted.org/BB/ubbthreads.php/topics/72250/1.html

I just saw that he has now published a book of the same title:
http://www.amazon.com/Mathematicians-Lament-School-Fascinating-Imaginative/dp/1934137170

For anyone that has read the new book: is there new content? It's 140 pages vs. the 25 page PDF, but in the first few pages on the Quick Look, it appears to be the same text in bigger font on smaller pages.

If he has expanded the text, I would certainly buy a copy!

The foreword refers to "this greatly expanded book version." Six pages of the book cover 2 pages of the PDF - but the foreword and illustrations get you to page 15. So I'd guess some new material, but not twice as much stuff as the original.

I haven't read the longer version, but I love the short version. I was convinced in only 25 pages.

Thanks for pointing out that section of the forward, AlexsMom. That's what I get for rushing.

Looking around today, I also came across Lockhart's replies to some of the questions and criticisms of his lament:
http://www.maa.org/devlin/devlin_05_08.html

Off to buy his book...