Update: Flock in Japanese has been released. You can download it here.Update2: A blogger found the right words to announce this release: Flock 日本語版 ｷﾀ━━━━━━(ﾟ∀ﾟ)━━━━━━ !!!!!
It's been a long time, but we're finally there: the release of Flock in Japanese is very close! You can read details (in Japanese) on the blog of one of the translators. It even includes a link to a pre-release of the Japanese version. As the translator says, it's better to send feedback about the translation directly to the translators. If you use the "feedback" button, that get to our support guy who won't understand much.
As good news always come by two, an other member of the JA translation team will make a seminar about Flock, in at OSC Kansai 2008 (Open Source Conference) on July 18th. If you're in the region at that time, that's a good opportunity to meet between Japanese Flock users/contributors.
And again, congrats to the JA localization team!