marco:

This is big. Stanza is the biggest ebook-reader iPhone app and is immensely popular. Congratulations to Lexcycle! (thanks for the link, Jason Snell)

We are not planning any changes in the Stanza application or user experience as a result of the acquisition. Customers will still be able to browse, buy, and read ebooks from our many content partners. We look forward to offering future products and services that we hope will resonate with our passionate readers.

It’s pretty obvious that Amazon intends to sell books through the Stanza app. Their own Kindle iPhone app is pretty minimally featured and needs a lot of help, but they have the best catalog of ebooks available, while Stanza is a very mature and full-featured app that needs a bigger ebook catalog. This was a no-brainer for Amazon.