This would make a nice video campaign for Pandora. Various different types of people saying "It's all my music." with references to the music they love.
Another reason for being exclusive in the Mac App Store: Getting to the top of the Top Paid/Top Grossing lists which help more customers discover them and provide social proof the app is worth buying. By not having other ways of buying this app, it concentrates the buyers through the Mac App Store which helps their ranking.
The app store significantly reduces the friction needed to discover and install apps. In the first 10 minutes of using it, I discovered 3 useful apps and installed them all without loading a disk image, installing it, dragging the mounted disk image to the trash, then deleting the disk image file.
I know many more people who have Kindles or iPads and nobody who own a Nook or a Tab... I live in the SF Bay Area but still, it's an oddly different market where you are... where are you?
I am in a suburb a good ways south of Atlanta, Georgia. Apple seems to have a relatively low market in general in my immediate vicinity except for iPods.
CS4 was widely panned and coupled with the poor economy, many companies skipped it. Adobe took a loss this quarter last year. The article doesn't state it but many CS3 owners have upgraded to CS5 because of the improving economy, some new features and not wanting to be too far behind software revisions.
The Android vs. iOS marketshare race is one in which iOS is hobbled because of iOS's exclusivity. When the iPhone 4 hits Verizon next year, $199 Android phones will take a massive hit in demand and they will quickly be dropped in price to spur demand.
Apple has dropped it's prices to compete before. It'll be really interesting if Apple drops the price of the iPhone below the top of the line Android phones.
Facebook has said that they don't want to put in features that would discourage participation. If someone updates their status and lots of people "dislike" it, they might not want to update their status next time.
For HN, I'd like to see a "track it" button - I don't want to upvote a lame article but often the HN community has a lot of interesting things to say so I'd like to keep track of those article's conversations.