Very informative, both in terms of how DRM is handled, what the feature set is on the app, etc. It had not occurred to me that Amazon had limited the font selection on the kindle in order to further reduce eyestrain; now, I suspect they did.
The most informative aspect, however, is the author's discussion of how he disables one-click for book purchases and likes the slow-himself-down factor of buying through fictionwise. A completely legitimate description -- and a completely legitimate strategy for a consumer.
For the seller, however, it sure makes the kindle combination of features make a lot of sense.