With not so much as a hint of fanfare (and a very loose definition of "coming soon"), Amazon has quietly unleashed its Kindle app for Mac. The 22MB file is for Intel-based machines only, OS X 10.5 and above. Nothing too fancy, it does exactly what you'd expect in terms of functionality... and not much else. What else is there to say? Time's a-wastin', hit up the source link to download.