Some have complained that the N900 cell capability feels like an afterthought, and is missing features expected on advanced communications devices.
While the N900 may be a mobile computer first, there is no reason to accept phone shortcomings if improvements make sense and can be reasonably incorporated.
If you have ideas for UI and/or usability improvements to the cell or even VoIP functionality, add them here!
Discussion thread: http://talk.maemo.org/showthread.php?t=33830