Other artists to have contributed helmets include Kasabian, Razorlight, The Editors, Feeder and Maximo Park. All the helmets are being shown at the 'Charring X' gallery in London, from January 10th.
UPDATE 13/01/06: The auction date of 10 January was announced on the official page for these auctions. However, it has now been announced that the auctions will not take place until a later date. Gorillaz are still confirmed to be donating a specially-designed helmet, and we'll bring you news of it as soon as there are pictures and / or ebay listings.