[ [b][u]Idea[/u][/b] ]: separate section below where you type the body of your thread for a thread summary; maximum of 140 characters (hey, it worked for Twitter); appears as you hover over a thread title; is viewable in smaller, grayer font above all OPs once you enter a thread*; it is optional, and thus not required to fill out before you make a thread; one *enter* counts as 100 characters since you shouldn't need it and it would reduce the annoyance of any possible spam people could create with it.
*the text within the summary is subject to the same forum rules as any other bit of text you choose to imprint onto these electronic pages.
Sorry about the lazy writing. I'm about to make this thread and go to bed so I'm not much for cleverly articulating my genius ideas.
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It'd work similarly like the Article Summary (or whatever it's called) works in Groups, only you could easily view it by hovering over the thread title. Also, @TGP, for some threads the title might work, but for 1000-2000+ word threads, there's so many ideas in there that cramming it into the title looks messy.