Read Paul's post on the latest addition to Google Labs. Installed Google Blogger, and WOW this is cool. Naturally first stop was to check out etymon (disappointing), and second to visit sites I visit regularly. Stumbled upon this quote recounted by Martin Fowler; would love to see some measurements.
While I'm on the topic of concurrency I should mention my far too brief chat with Doug Lea. He commented that multi-threaded Java these days far outperforms C, due to the memory management and a garbage collector. If I recall correctly he said "only 12 times faster than C means you haven't started optimizing".