[davidspalding]

terrypin, you are ultimately responsible for reading the details of e-commerce sites' checkout pages. i've made some purchases there, and find that keeping < US$10 in my micropay account makes things work nicely. as i recall, the CC surcharge warning is right there, clear and bold, near the product list table. hard to miss.

regarding your format comparison, consider that you can adjust the font size considerably in Mobipocket, resulting in changes to the "density." I find Mobipocket is so much faster, that your comparison should include time to open an eBook to the last page read in each format. if you're like me, you'll find MS Reader is a shopping cart with a broken wheel, compared with other programs' Porsche-grade performance.