Hmm I dont know if I would say dissapointing.

I will agree that the n900 could do with more physical memory than 256MB however on thinking about it in the 7 months I've owned mine I have not gotten an out of memory once! (there is virtual memory too which is slower but still it helps a lot...)

256MB on the root fs however is somewhat restrictive even with the fixes put in for pr1.2, I have been down to 12kb as ovi store downloads into /var/tmp

Retina display and amoled... I feel that retina display is a bit of a marketing gimmic, it is 640 x 960 and the N900 is 800 x 480. Its definately a higher resolution than the n900 but is it really that visible to the naked eye, my n900 looks pretty damn sharp to me, so is retina really that much better? As for amoled, I have heard reports that while it is brighter and sharper it is harder to read in bright sunshine - this is not a problem I ever have with the n900 which is great!

Battery life for all smart phones seems on par with the n900, maybe the n900 is a little worse but I dont know I only have an n900...

The form factor (brick) could be much better but its got a physical keyboard which is great, I wish it was thinner but I cannot really complain its not that bad at all for whats packed into it! Check out the motorola droid/milestone which is slimmer than the n900 and packs a keyboard however the keyboard from what you read sucks as the keys are all flat and its harder to type on! The droid also packs a larger screen at 3.7" which is what Nokia should have done for the N900 from the get go...

In terms of processors it seems to be that this year has really been the year of the 1Ghz snapdragon processor, the N900 came out last november so it is somewhat dated now. However when you consider the OS it more than makes up for it, it is also still a pretty potent CPU with users reporting overclocking to around 1Ghz possible.

There is definately room for improvement with the n900 and hopefully nokia takes all of this into consideration for the upcoming meego device.

The problem with mobiles and electronics in general nowadays is that the minute you buy the latest device from any company, give it a week and it is old hat as some other company has come out with something bigger and better!

I for one am still very happy with my n900 and find it is continually up to everything I throw at it...