Doesn't surprise me
Considering that Jobs & Co must have realized how quickly the other companies just jump on this should it proove a success (and I'm sure they knew it would be), they probably had everything in place to do it, just had to work on some final bits.
If it's correct then Apple could be about to completly rule the online music roost. It will be interesting to see how their stock does once the other 95% of the US computer market (sorry, everybody else - I wish they'd get the music store in you're area too
).
If they make around $1 million a month profit (after the industry cut) with just US Mac users, they could probably bring in $10 - $30 million a month
easy with Windows users out there.