Nearly 250 Amazon customers have joined an informal boycott of digital books priced more than $9.99 at the popular online retailer--they have already tagged more than 770 books with a "9 99boycott" tag.

Over at O'Reilly TOC blog, Andrew Savikas links to bloggers who have joined the campaign.

One Amazon reader summed up the boycott here: "Kindle books are kinda like movie tickets. While you can re-read the book, you cannot: donate it to a library, sell it to a used book store, sell it on Amazon's Used Marketplace, [or] trade it to a friend ... The publisher does not need to pay for paper, glue, press time, press employees, insurance, ink, boxes, or shipping. Amazon does not need to stock its warehouse, pay staff to fulfill orders, or pay shipping. The price needs to reflect these VERY important facts."