The costs of processor per machine went down over the last yeas dramatically. ten years ago, a dual processor machine had the cost of a mainframe (i remember alta-vista vs. google discussions). today, a quadcore processor cost a few hundert dollar. i would expect a similar price for 32 cores in a few years from now.
Sure, DHT is just the basic workhorse, most of the other examples have also quite different properties than e.g. cassandra. What is the problem with the term "project"? xotcl-core and xowiki went out to be compatible with the acs data model. There is nothing wrong in having a project developing an acs package based on p2p technology. Many people will appreciate it. From the scope of the work, it is a project.
