No more monthly hardware NPD data for the public

Beginning with the October sales data, which is due later this month,
NPD is going to cut way back on what they share on a monthly basis
with their non-paying customers, i.e. media.

What does this mean?

For starters, no more hardware sales data. (Can you taste the bitter
tears streaming from various forums and message boards?) Sony,
Microsoft and Nintendo will of course be free to release their own
sales info-and presumably leak that of their competitors, if it'll
make them look good-but we will no longer receive that data from NPD.
Software sales figures will only be given for the Top Five SKUs, not
the Top Ten as we normally receive. We'll eventually receive hardware
numbers and Top Ten software numbers, but only on a quarterly and
annual basis. There are signs that this may only be a temporary
pullback, but for now, this is were things stand.

http://blog.newsweek.com/blogs/levelup/archive/2007/11/06/monday-morni...quarter