User Interface Engineering just republished my Previous and Next Actions in Web Forms article with additional insights by Jared Spool:
"Luke Wroblewski shows us what we need to know to make an important part of that chrome invisible: the Previous and Next actions. He’s done a fabulous job of dissecting the problem and talking about exactly what needs to happen to make the interface seem natural to the user, which, in turn, lets them focus on the content."
Check out the full article at UIEtips: Previous and Next Actions in Web Forms