With its adjustable shelves, the IKEA Mandal headboard is already fairly adaptable, but have you thought of using it in ways other than a headboard? These folks did; perhaps it will inspire you to look at the Mandal with new eyes of possibility.
New life for IKEA furniture from SUPERFRONT. To Australia they only ship handles and legs. Otherwise they provide possibilities for upgrading your Ikea furniture with cabinet fronts for a custom "Ikea hack" look.
the cabinet-turned mural: There's your typical storage, and then there's this. Stack two sets of a pair of Ivar cabinets side by side, and paint a mural of your choosing or cover with a graphic wallpaper.
7 Ikea Hacks for Your Kitchen That You Can Actually Do