Which is why, when it comes to the iTunes Music Store, we took Apple's "million songs sold in one week" press release with a big ol' grain of NaCl. (For the scientifically unschooled, that's the chemical symbol for the element "Nackle.") Of course the store is going to see a lot of traffic during its first week, as everybody and their Mac-using grandmothers give the service a test drive to see if it lives up to the hype. Don't forget, out of those million songs sold during the first week, over a quarter of them were actually purchased within the first 18 hours. So there was a definite tapering off once people had satisfied their need to kick the tires.

But wait, what's this? Apple has just issued another press release, this time revealing that the iTunes Music Store has sold two million songs in its first sixteen days. Well, braid our hair and call us Heidi-- this is actually starting to look sustainable or something! Heck, if you factor out the first-day sales spike, it looks like the iTMS's weekly sales may even be increasing slightly. Roughly a million songs sold each week is definitely nothing to sneeze at, and once Apple extends the service to Windows users as promised, we imagine the numbers are going to skyrocket.