I mentioned at dinner how much I like listening to UCB Prof. Kathy Yelick's lectures. Here's some slides I found of hers. She is also associate lab director of NERSC at LBNL.
Here's the UCB web page about their view of HPC/Parallel computing.
I think the one-way (DMA) messaging model is very important, especially when it can be hidden and automatically (and correctly) done by the compiler (requires new languages?).
Any time you get a chance to hear her (or invite her to speak) you will enjoy it. The work they are doing there will inform you to benefit your own work.
US Geological Survey