A single-page multi-step form

Rather than using a multi-page wizard, ebay uses a single-page form, divided visually into separate steps, for posting items for sale (click to see full-sized image):

The strong visual weight given to each section effectively breaks the form into separate steps.

A risk with long, scrolling forms is that users can find them overwhelming.  The single-form approach (vs. a wizard approach) is most suitable where:

• There is little or no conditional logic to the flow
• The overall flow is short
• Each step is relatively easy (both in terms of interaction time and cognition required)