Let the hive mind of Engadget get that for you.
"I'm looking for a solid state drive, around 32 to 64GB, for use in my web server. The drive will contain my web sites and the operating system, either Windows Server 2008 R2 or Ubuntu. Large storage is handled by a separate RAID array, so capacity is not an issue. Rather, I am looking for the fastest, longest-lasting, and most reliable drive under $150 that is suitable to my application. Any thoughts? Thanks!"
1. There is no reason to sell them to consumers because consumers (for the most part) have shown no interest in buying them. They would rather rent.
2. The manufacturers don't want to sell them to end users because of the potentional support nightmare (Ben, being a Vista Media Center Cablecard user, you should have some knowledge on this).
3. The retailers don't want to carry them, again because of support issues.
Those are all narrow-minded reasonings.
The fact is, if someone released a compelling-enough STB, consumers will sit up and take notice, and carriers and retailers will support it. Just ask Apple and iPhone users.