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!"
It can be blocked. I work with AT&T and we block text often. Why don't carriers advertise it? Because it makes them money. Same reason they will mention Media/Data or other Add-Ons as if they are just part of the package. "You will have 450 minutes, unlimited internet, unlimited Messaging - all for just $75!" instead of "You'll have 450 minutes for $40. Now, I can add unlimited media for $15, and if you want - unlimited messaging for $20!"