A couple of other pieces are in the works, but this just announced from OCZ and Marvell. I didn't see any mention of exclusivity in the PRs, but AnandTech says so and mentions what caught my eye when reading the PR: it's PCIe on x1 channel. What's up with that? There's that line from "The King and I" (film version, at least), that goes "A bee flits from flower to flower...". OCZ is sure doing that with regard to controller.
Last I knew, PCIe SSD were controller-less (in the silicon sense), off-loading control to code run on the cpu. Depending on who one follows, this is either a good thing or a bad thing. Said code is written by the SSD vendor (or bought in).