solidDB has been available as a MySQL storage engine for about four months now (check here: http://dev.soliddb.com). It is one of few transactional engines available. You can see it running at the conference. You can try yourself. That is not, however, the end of the story.
People who have heard about Solid know that Solid has other goodies, too, in addition to just plain old database (PODB :-). Solid has been selling for more than 10 years to demanding markets of network equipment providers and other embedded systems. In the process, a few unique incarnations were born. One is a fully transactional in-memory database that may be transparently blended with the disk-based database. Another is a load-balancing two-node hot-standby configuration with sub-second failovers.
These goodies are not offered yet to the MySQL community. They will come ... in time.
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