As I understand it, the rights to using the Marvin name and signature expired earlier in the year and have not been renewed, hence no more Marvin guitars. The Burns Dream guitar is, however, essentially the same thing with a few upgrades (albiet in different colours etc).
If you really want a Marvin, they come up quite regularly on Ebay and the like, often in mint condition. Oasis music in Ringwood also still have a couple of new ones in stock, as do Hotrox (one white, one red).
They really are terrific guitars.
Cliff (no, not THAT Cliff
)