I think they are quiet simply because it's not ready to show to the world yet. I do hope they've gotten feedback based on the initial announcement and have decided on user-replaceable RAM. There are many who would buy this who don't know their future requirements for RAM. Sure big businesses will just have a stock config, lease them for 3 years and then hand them back, but smaller places will keep them possibly longer and will probably increase the RAM before end of life.