Still pretty much vapourware. "November 5, 2008--Wolfram Research announced an initiative today to develop a cloud computing service for users of their flagship technical computing software, Mathematica."<p>(Having said that, I'd expect Wolfram to do this sort of thing pretty well. Mathematica does stuff at a high enough level that automatic parallelization at least has a chance, and they've already got some of that for SMP systems in Mathematica 7. It'll probably need some tuning to make it effective in a cloud-computing context, where the communication overheads are higher.)<p>Also not Amazon-specific. "Nimbis Services will enable the Mathematica cloud service to access many diverse HPC systems, including TOP500 supercomputers and the Amazon Elastic Compute Cloud."<p>(Quotations are from the Wolfram announcement linked from the AWS article: <a href="http://www.wolfram.com/news/cloudcomputing.html" rel="nofollow">http://www.wolfram.com/news/cloudcomputing.html</a> .)