Since last week's update we've been able to make progress on a number of fronts.
In the language specification, type cast construct has been specified, static methods and top level functions are now compile time constants. Also, we're publishing the 0.10 spec draft.
In the VM we've landed further improvements to old-generation growth policy to limit growth of the heap. There are new compiler implementations for both ia32 and x64. We started implementing optimization phases in the new compiler and made further debugger improvements, starting to break on exception throws.
In the Dartium, we fixed a severe bug with overloaded methods and optional arguments and lots of other bugs in addition to that. Moreover, transferables in messages are now supported.
In terms of library work, i18n interfaces were created for String and Date and we landed new expectation classes in lib/unittest. We also added UTF, URI, JSON, and Crypto to the Library Tour.
Enjoy this 3 min video intro to Pub, the package manager for Dart.