THERE WAS A NEW S-ATA spec released today, but it is more of a housecleaning step than a huge leap forward. The new SATA 2.5 spec is an aggregation of seven others, all rolled into one, aimed more at people building the devices and systems rather than the end users.
The specs, SATA 1.0a, and the six post SATA 2.0 extensions, are now collectively called SATA 2.5. SATA 1.0a is an minor addition to SATA 1.0 spec, and as with most things with an 'a' extension, it cleans up problems at 1.0. The post 2.0 specs are a little more interesting.