[Simetrical]

Heh, like we don't have that already? t=143297, or pick one of p=1213498, 1213537, 1213543, . . ., 1240736, [whatever this post number will be], add on any page=, perpage=, lastpost, you name it. You'll want to rely on appropriate nofollows/noindexes and site maps if you want proper indexing of vB regardless of this, I'm thinking. Threads don't lend themselves well to unique URLs (because who says post X will stay on page Y of the thread, or in the thread at all for that matter?).