Apple Reminds Users that Boot Camp is a Leopard Feature
Apple states that the Boot Camp Beta program will end when Mac OS X 10.5 (Leopard) is released in October, 2007. Boot Camp 1.2 has already expired as of September 30th, while Boot Camp Beta 1.3 and 1.4's license expires the moment Leopard is released. This seems to suggest that the software would remain functional, but that the licensing terms only extend until Leopard's release.
When Apple first released Boot Camp, it was billed as a feature of their upcoming Leopard operating system, but released as a public beta at that time. Apple has since released regular updates to Boot Camp, with the most recent release in August 2007.