Lately in WebKit:
At least bi-weekly is something!

Hello surfers! What’s been up?

The JavaScriptCore team’s four-tier JIT branch has been merged into trunk by Oliver Hunt. While we’re not blazing up to the 4th level just yet, development has moved to trunk and the future looks very interesting!

Cool user-visible hacks

Cool engine hacks

Cool special mention

That should be it for this time around. As always, you can honk at @awesomekling and @awfulben on twitter with questions/suggestions for these blogs.