From Pragprog's contact page[1]:

> Our paperback titles are distributed to retail bookstores by O’Reilly Media, and are stocked and shipped by Ingram Publisher Services. Please contact Ingram or O’Reilly to order. If you have any difficulty obtaining a paperback title, please email us at support@pragmaticprogrammer.com.

There must be some similar deal with NoStarch since their books also appear on O'Reilly's site.

That said, I still somehow wish the main link here were to Pragprog's page.

[1]: http://pragprog.com/contact

And it looks like this one has not landed in O'Reilly's Safari (not yet, at least).

Reseller agreement I guess ? I seem to remember it's been that way for a while already.