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Cross-browser work has begun on WebAssembly, a new intermediate representation for safe code on the Web. This will be a key step for the Web and improve the performance of browser based development tools. CNet has a good higher level look here.
‘Spot instances’ provide a mechanism for bidding on cheaper latent capacity on EC2. Jeff Barr is planning to share some best practices on using the spot instances system over time and starts off gently here.