1. 0.05 KB/email is wrong. That's fifty bytes. It's 0.05 MB. So 5 million e-mails, not 50 million.
2. On DRM-free 256k songs, at a little less than 4 minutes apiece, which is average, we're looking at 7.5 MB per song. About 33,000 songs downloaded per month.
3. HD movies...they've got the bitrate way too low. A feature film is maybe 100 minutes. With their calculations, that pegs movie compession at about 2.67 MBit/s. iTunes' movies are a mere 5 Mbit for video alone, plus another 160k or so for audio, so we're looking at 4 GB per movie, or 63 movies total. Or, let's put it this way, you can watch about 104 hours of 5 Mbit/s HD content per month, whereas Comcast allows unilimited TV viewing, possibly at higher bitrates
4. Don't know where they got 10MB from; JPEG files are less (2-5 MB), RAW files are more (20-30 MB).
At any rate, I might go over the limit. Not good.
