A post I saw while crawling the forums during one of my 'no sleep' periods has me wondering the same thing the original poster is: where in the Outland are Turalyon and Alleria? We were told prior to The Burning Crusade's launch that we would discover the fate of the Alliance Expedition, but while we've found out about Danath (running Honor Hold), Khadgar (communing with A'dal in Shattrah) and Kurdran (he's running the Wildhammer Stronghold in Shadowmoon Valley) we've yet to see more of the fate of the two last members than the surprising fact that they have a son who is now grown up enough to wear Pally Tier 2. I wonder if anyone has told the Horde that Sylvanas is an auntie? (And man, I don't even want to think about the kind of gifts Auntie Sylvanas would give.)
Personally, although I can hardly pretend to be the lore expert around here (we all know who that is) I'm enough of a mark for the lore that I want to see what happened to the guy who picked up Lothar's fallen sword and kicked Doomhammer's ass up and down Blackrock Mountain. (My tauren would just like to tell me to stuff it here.) Not to mention all the possible drama of a Windrunner family reunion. Are there any in-game clues to where these two ended up? Does anyone think we'll find out more when the Sunwell Plateau goes live, or are we going to have to wait for Wrath of the Lich King, or maybe even beyond that?
Edited to add: I forgot to mentioin that, despite the Allerian Srronghold bearing her name and having several high elves manning it, Alleria is not to be found there.