[bambam]

Is there a way to modify the 'view posts in last 24 hours' search to allow a date entry? 'view posts since X day'? Or even a view posts in last week/month might do it.

At least that would get back all the potential posts that are unread, although not in bold and marked as such.

Yes, this is also possible.

There is also the option Bagger mentioned in his first post about turning on database tracking of read/unread threads. We haven't used that feature before, but is supposed to only mark a thread read after you've viewed the last page of the thread.