We seem to regulary run into clients who like the idea of converting a Lead into an Account, Contact and Opportunity - but they would also like to be able to convert backwards into a Lead again.
Why? Well, maybe someone in the Lead Management group qualified the lead, but when they passed it along to Sales, they could not longer get in touch with the lead. The options are: (1) make Sales work it until they can get back in touch, (2) train Lead Management to work with Accounts, Contacts and Opportunties, (3) forget about it (which most of them do), or (4) re-create the entire record as a Lead again.

But now there is another alternative (read the full story for the rest)...