The one thing I am a tad concerned for is that in one of the threads around someone discussed that historically for maemo, Nokia has maintained a 2 platform support for a device... Meaning that say, when the M6 device hits the streets, the N900 should get M6, but when the M7 hits - the N900 will not get that, whereas the M6 device will.

Theoretically this should mean a 2 year support plan for any given device or hardware assuming they release a new maemo every year (which wasn't the case, obviously, from OS2008-M5). However, then in another thread (or same one?) they mention the M6 device is rumored to hit as soon as mid-this year.. which would be less a year. At that rate.. the devices won't get a full 2 years of support.

With the G1 still getting updates being released mid-end 2008, the 2 year mark is coming up. However, it does appear the G1 is going to be left behind from 2.0+ which would mean Android is cutting the 2-year mark close.

The original iPhone released in 2007 I believe got the latest 3.1.2 version of the OS released in October of 2009, which is longer than 2 years from it's original release.

The N810 was also released in '07, and received the Diablo update in 08. AFAIK it received no "major" updates after that, meaning it was more or less forgotten within a year. It also doesn't coincide with the mentality of "2 OS's" per device, as it was shipped with OS2008 and went to Diablo, but Diablo was just OS2008 with enhancements. Not a complete new OS, and of course - M5 is not available for the N810.

Granted, this is all speculation and just pieced together from various threads I've seen on the forum here. This is the only reservation I have about Maemo and the N900. While definitely not enough to prevent me from buying the device.. it really makes me interested to see what Nokia has in store for the N900 in the future, and how well a constantly moving Maemo will hold up to Android if Android continues to patch older 1.5-1.6 even with 2.0+ out.