An Open Letter to the Developer(s) of Conficker
bluh.org
bluh.org
Summary: "Conficker authors, please destroy Facebook, MySpace and World of Warcraft so I can hangout with my friends face to face".
This would be quite different to SETI or other similar distributed-processing apps, as it spreads itself without user intervention / specific installation. If this was used for some useful purpose (eg auto-mirroring content based on current traffic) I could see some very interesting possibilities.
However - the temptation to subvert it for nefarious purposes once it is up and running is likely to be too great for it to last long...