guys n900 isn't a tweaking only phone, i do a 100 things on it everyday and none of them have to do with x-terminal ( well i can't lie, arround 15 of them are in xterm )
but really, you want texting, calling, chatting emailing, web browsing, play music and videos, youtube, facebook, twitter, send/receive files..... this phone is the best in doing all these stuff (don't forget you can do them all at the same time )
just enjoy your phone, if it makes you feel better, do what i do, just find a friend that has an iphone, or an android device, than start comparing your device to there's (multitasking, web browsing, rdesktop, ....) and you'll see that the n900 will crush them .
edit: don't forget if u want tons of apps and games get nitdroid.