cf. URL: http://bgp.he.net/ipv6-progress-report.cgi
It would be interesting to have some additional statistics. For example, for the NNTP (Usenet) servers, a listing of which ones have IPv6 adrresses would be nice for the curious. In order to count them, you obviously know which ones.
PS: I note that HE still hasn't assigned its OWN Usenet server an IPv6 address. ::)
I'd love to see the graph with the rough number of peering sessions updated for '09 as shown in this report.. http://he.net/news/Hurricane_Electric_IPv6_Update_April_2008.pdf