If you have read Eldar's review, you might notice that there's apparently a mysterious N920 already making the rounds in the Espoo campus, an N900 without a hardware keyboard !

We’ve heard rumors in the past that the N900 will remain Nokia’s sole Maemo 5 phone for at least a few months, so we might look to see this in first half of 2010...

If i could remember, there was a post by Eomer (a trusted member on mobile-review) that said there will be 2 Maemo devices in 8 or 9 months (one of them being the N900) (see the quote below) :

Maemo is the new high end platform.

First device, already well-leaked, in Autumn.

Second device Q1 next year.

New cool UI on top of Maemo from around June next year.