Compression IS a bad thing. It hurts incompressible data write speeds because it allows the manufacturers to make SSDs without any Ram cache. This is the only reason why the Sandforce controller has been able to elbow its way into a market dominated by Intel & Indilinx. On paper and in synthetic tests, the SF is cheaper & faster but in the real world, that lack of cache really does hurt.

I've measured the averaged sustained sequential write speed for an incompressible x264 file to a Vertex2 @ ~95MB/s. This is MUCH slower than the indilinx which can easily pull off ~190MB/s sequential writes no matter what type of data.

I personally don't think Intel would ever create an SSD with compression in it because people could easily sue them for misleading advertising. Quite frankly I'm surprised no one has sued OCZ/Corsair any other manufacturer for false speed claims on the sandforce SSDs with incompressible data.