An SSD isn't only it's memory but the controller. So far the best controller available is made by Intel (and used only on their range) followed by Samsung, Indilinx (a startup made by Samsung ex-employees) and JMicron (which is used by most cheap SSDs and in general terms suck). The controller manages the latencies and bandwidth of the SSDs making them usable as hard drives.

There is a very enlightening article in anandtech about SSDs on the subject: http://www.anandtech.com/storage/showdoc.aspx?i=3531

I agree, the DRAM makers have a pretty good hold here, why dont they make the drives?

When you buy Intel SSDs you buy SAMSUNG, no lie.

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SSD's won't hit mainstream till next year. Currently Western Digital doesn't need a marketable SSD until next year, there is simply no need to invest in a technology that won't be big till 2010-2011. So by buying this company this will allow them to develop their own SSD within a years time; it won't be perfect but it should be a marketable SSD. I would have figured Western Digital would have bought a DRAM maker such as Gskill, OCZ, ect.