Hybrid Memory Cube is 15x faster and 70% greener than DDR3 (hybridmemorycube.org)

That's a disgusting amount of marketing hype. I wonder what the reality is.

If it's for real, let some independents play with a prototype and it will sell itself.

Will make caching in HM EC2 instances easier - if they work as well as stated - just stack a few of these puppies together and you could run your DB entirely in memory :D