One of the authors at Ikea modification weblog Ikea Hackers had a 10" gap between their refrigerator and the wall. The author's house didn't have a pantry so he added casters to Ikea Kilby Bookshelves, added a bit of moulding to cover the casters, painted the side of the shelf to match his cabinetry, and added a matching cabinet pull.
Full instructions and additional photos can be found at the source link below. This Ikea hack makes me wish that our 6" gap between the fridge and wall was a few inches wider so we can try this out.
Kilby goes for a roll | Ikea Hackers