As we found out in our Z68 review, Intel's SRT (SSD Caching) is basically a software tool baked into Intel's RST driver - there's no real hardware requirement in the chipset, just an artificial one. Diskeeper provides OEMs with software that's designed to do the same thing, it's called ExpressCache.
The driver loads at boot and can apparently speed up boot time. Like Intel's SRT it will filter out some operations to avoid polluting the cache (e.g. sequential accesses). Unlike SRT you can manually pin applications to the cache. Ultimately how well it performs will be up to the algorithms Diskeeper implemented.
The company was present at SanDisk's booth showing a quick boot time demo with an 8GB SanDisk SSD used as an ExpressCache vs. a standard 5400 RPM HDD. Obviously the SSD enabled solution was faster.
OEMs are expected to start shipping SanDisk + ExpressCache systems this year.