Well it was about time we got around to updating the ISC Poll.  I came up with the current poll after reading Lenny's great diary post on "Tips to responding to a DDoS attack".  So that being said please do participate in the poll, the results should prove to be interesting in quantifying how many organizations suffer from these sorts of attacks.

Direct link to the poll

http://isc.sans.org/poll.html?pollid=235

Some other interesting reports/statistics on Denial of Service attacks can be found at the links below. (feel free to submit other links at https://isc.sans.org/contact.html )

Arbor networks blog post (to see the full report it may require divulging your email to a sales guy)

http://asert.arbornetworks.com/2008/11/2008-worldwide-infrastructure-security-report/

http://www.shadowserver.org/wiki/pmwiki.php?n=Stats.DDos

http://www.shadowserver.org/wiki/pmwiki.php?n=Stats.DDoSHistorical