Currently you can only change your status with deleting old from "profile posts" or writting a new one. However, I miss the feature which allows you to only kinda "hide" it, but it remains under "profile posts". You can do that at Facebook, and for us who don't update statuses very frequently it's a great feature.
Real example: I registered some days ago and posted status "just registered ". After a week that status makes no sense anymore, but it's still shown on my membercard. At this point I want to simply "hide" it, but I cannot do that without removing it from "profile posts".
It would be really nice to have a small "x" near the status in our profile which would allow us to hide it, but it would still remain udner "profile posts".