CDRinfo reports on an upcoming "Super Combo Drive" from Sanyo Japan this summer:
The drive will support both CD and DVD formats, becoming an alternative solution to existing DVD writers. In addition would offer the faster DVD recording speed (4x) among with a new technology that adds 650MB to normal CD-R media reaching 1.3GB with 650MB and 1.4GB with 700MB discs!
This drive will reportedly support the DVD-R/RW standard which Apple has adopted. The non-standard 1.3-1.4GB formats are not readable in standard CD drives without firmware updates.