On mine it's there every day. Not constantly but it's there a lot. Just checked it right now and it's not there but this morning it was.
I know I'm a little late to the party, but I get the Swype icon in the notification area, as well. It seems to be there whenever you have a cursor ready to type, whether it be in a text, web browser, etc., or if you locked the screen when the last "click" you did was in a text-typing box.
Anyone have a fix to get rid of this?