Ah, ok, Scream. Apologies for not having read through more thoroughly; wish I had time to hang around here.
It strikes me one the solution could also address the fact that there are now three ways to set age views ("view recent messages", "show threads active in...", and the prefs option), which is a bit sloppy and confusing.
On my site (currently using wwwboard), we've brewed up a feature which creates a mini meta forum index console which shows all new postings as of a user-configurable date (wish it did it to the hour, but currently only by date). If W3T were to implement a solution something vaguely like this, that would consolidate the age/recent stuff, plus you could "show replies to my postings since that date" by highlighting or otherwise marking those replies.
We have users launch this feature via javascript, so the window can be sized small. To see that, use the link to "HotPosts" atop my homepage at http://www.chowhound.com/main.html
To go directly to HotPosts (and resize yourself), go to http://www.chowhound.com/hotpost/hotposttoo.cgi
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