@CYPHERC
It sounds that you might have installed something that makes your N900 crawl or you might have triggered some bug.

You can list installed applications to xterm with command
maemo-list-user-packages

To make list text-file you can run command
maemo-list-user-packages > list.txt
And attach list to your message (you have to write in advanced mode here if you want to attach files)

Other useful command in xterm is:
top
Which shows processes sorted by cpu usage. Xorg should take about ~2-4% but any other process (if you have closed all apps and virtually nothig else is not running) should not take over that.

And about phone application and rotation. I have noticed that I try to avoid portrait with this device as much as possible. It just doesn't work as it should. I have set (from phone app top menu) phone app to always landscape mode so that i do not have to worry about rotation issue when answering phone call. After a while it feels comfortable :|