Phew. After several months worth of speculation, Amazon has finally cut the ribbon (or whatever the online equivalent is) on its music downloads store. It's called AmazonMP3, it's US-only for the moment, and it's offering over two million DRM-free MP3 files for 89 or 99 cents apiece, with albums priced between $5.99 and $9.99. Amazon has signed up two major labels for the store - EMI and Universal Music Group - plus thousands of indie labels. The songs are 256Kbps files, and will work on iPods, Zunes, mobile phones, PSPs and any other device you care to name.