I don't think any person would be that sorry for buying N900 to state it here, because the phone is top of the line with its processor, memory, OS.
I want to buy one N900 if the price would drop 100$ in 1-2 months or I might go for the Maemo 6 device if it will be released in the summer and not later.
The only thing I don't like is the "optify" procedure for the application, and the need to do extra steps besides download and install when getting a new application. If the device wants to be popular, they have to renounce on the Linux way of seeing things, should be just applications that install nice and firmware that install OTA without any complications.