"Also you could make the user choose what kind of greeting they want to give; flower, greeting, wink, hug, kiss and have it editable in the admin panel"

"Also you could do is put a X mark or a check mark when the user entered the correct password or whatever."
If you mean that this will remember you...good.

"Also to have a check availablity below nick name to see if other users have the same screen name"

Really great ideas. I hope this small features will be see more added in the final release.