Sorry n900 fanboys, but this has happened before. I'd put money that this happens in this order with these details.

1.n900 never hits stores besides the nokia store
2.n900 never hits mainstream
3.Maemo 5 gets a "chinook to diablo" type upgrade and maemo claims that this is the 2nd os for the n900
4.N1000 or N millennium comes out in december of 2010 as nokia's flagship device.
5.N millennium is mainstream and because it is STEP 5 OF 5.