info box plugin

Hi! I′ve searched a bit myself, but can′t find anything myself: Can anyone tip about an easy to use info box (to drop some facts (bulletlist, etc.) about the theme /case you write about in a post or page)? Preferably with possibility to insert an image, but not necessarily.

I guess I can do it by coding too, but I′m just not capable of it – alternatively, can anyone point me to instructions on how to code an infobox?

Steffen.