An interesting nascent market
Personally I think this market is interesting however is engineering for a Flash array really that difficult?
surely it shifts the bottlenecks away from spinning disk, so then you need to deploy your software, disk replacement and controller (a bag of processing, RAM, cache, I/O cards) more effectively so it can deal with the throughput. Stick in a few wear leveling algorithms and stuff around write caching and its just done?
The new companies that will succeed will be those that execute best on getting new customers and keeping them, making the biggest noise in the market and/or developing strong channels through which to sell it.
Flash may also turn out to be a disruptive technology, such as iSCSI, which has become prevalent, when once considered a game changer: by itself is now just one of the options for protocol choice when thinking about Ethernet-based storage, and a box-ticker for RFPs.
We shall see I guess...