Today is the 24th day -- about 3.5 weeks -- since FC6 was released. Since release, we've been tracking the number of unique IP addresses that check in via yum for updates.
This metric is much more useful than tracking downloads, because it demonstrates actual *installed instances* of FC6 that are making a connection back to our servers in search of updated software.
A few minutes ago, we crossed over the 300,000 mark.
https://www.redhat.com/archives/fedora-announce-list/2006-November/msg00002.html