Update July 29, 2009:
Per Gabe's reply in the pinned 'missing attachments' thread, thousands of image attachments were lost due to human error: a snafu in the way that backups were being made/restored around the time of the hacking (it wasn't the hacking that resulted in the image loss, but the backup procedure itself, which has since been changed to avoid this happening in the future). I asked for (and still await) a bit of further clarification on this weeks ago, but it seems safe to assume that what remains gone will never be restored, no matter how many folks continue to ask/complain/bemoan the fact.
Chat has been up for a few weeks. Sadly, for some not-insignificant portion of users, it's inaccessible and/or useless. Many folks continue to be unable to login to it, getting that all-too-familiar 'invalid' error, and others (including myself) can login, but are disconnected seconds later.
The Search function has been activated and is admirably fast. Unfortunately, it is also deeply flawed: the last several times I tried to use it to find something, it missed threads I was seeking, even when (they were later manually found) all the correct and applicable keywords were used. It's like a fishing net filled with big holes... about 50% effective IMO.
"And that's the way it is." -W.K.