Storage Security

Now some time ago I wrote here about a storage security area that I was interested in (self encrypting drives within arrays), now I see that there are again updated documents and specifications from TCG on this area at :-

http://www.trustedcomputinggroup.org/developers/storage/specifications

I'm also hearing from vendors that there 'effectively little/no' disk drive availability in the market that supports this standard - and hence array manufactures are diverging into their own kludges...

To be clear though, I don't see this as a prime means of security - I fully subscribe to 'protect information, and protect it from point of creation/ingestion' - but I see this as a useful tool to aid with drive swaps & array disposals...

So my questions are :-
a) Is anybody interested in this topic area?
b) What are people seeing / hearing in this area?