MotoGP.com is reporting that Ilmor have confirmed their entry as a wildcard at Estoril in Portugal. They will be debuting their 800cc 70° V4 bike, dubbed "X3", at the Portuguese Grand Prix on October 15th, with Garry McCoy riding, using Michelin tires. McCoy has been testing the Ilmor at a number of tracks over the last couple of months, including Albacete and Jerez.
The importance of this appearance is that it will be the first time that the new generation of 800cc bikes will hit the track in a public, timed event, and set the mark against which the current manufacturers' bikes will be measured against. The Ilmor has already made an impression, regularly running faster than the Ducati 800 at one test session in Barcelona a couple of weeks ago.
You can listen to an interview with Mario Illien in the latest MotoGP podcast.