The Dart Editor SDK updated to R25388. This little snippet caught my eye '2,000 additional editor tests added to build (now at 5,000)'. The analysis engine has also had some fixes and expansion.
For those interested in polymer, check out Seth Ladd's examples on GitHub. In particular the Simple Custom Element example is very handy when getting started or when troubleshooting something more complicated.
Two interesting package updates - the self explanatory gifencoder and an isometric 3D library StageXL_Isometric.
Sorry to end on a sad note, but this week we had to bid a final farewell to Ginger the chicken who posed for my profile picture on GitHub. You were a chicken of great personality - so long and thanks for all the eggs!