I am too lazy to search but qgil did indicate that no one will have the n900 in their hands before or during the summit. So the shipping is definitely going to be after October 10th. So you guys do not get your hopes too high.
If you want to have a campaign before or around the Summit you won't be able to use and show the N900 itself. Actually you won't beable to tell much based on your own experiences since most of you will not have grabbed one yet.