I've lost n900 a couple of months ago, and thought that It's time to change the device to something that is not dead upstream. Since I can't imagine myself using phone without qwerty keyboard, I bought HTC Desire Z.

After a week or two with that, I've realized that Android is just so worse that Maemo that using HTC is a continuous frustration.
No normal multitasking (that means, you try to open a non-default mail folder and, while it is being loaded over slow connection, switch to something other. Then, when you return to mail app, it gets current folder lost, and shows default folder again).
Although hardware keyboard is there, it is not very useful - because all apps assume portrait mode and, when turned landscape, have only tiny part of interface visible.
Skype application looses 60% of screen space for screen candy - and only a small column for actual chat content.

Etc etc

So I sold that device and got an n900 again. Now using that.