Some other non-canon stuff on wowwikki and wowpedia mentioned that he resides in the Northeron area - that inaccessible area northwest of eastern plaguelands - and that there could be many more high elves located in a large settlement called "Dawnstrider Harbour".
I also found this map that has somehow been put together to show to us what the unknown area could possibly be like:
Here is a map of it prior to the 3rd war...
And another slightly different map...
If any of this is true, does this mean high elves could suddenly have a massive boost in terms of likeliness of introduction as a future playable race? Do they just have a huge hidden population waiting for the right time to emege from isolation?
If not, it all makes for interesting reading anyway.
I am just fascinated to know more about this Northeron zone and what it holds - could it be a focus of a future expansion, just like Quel'Thalas was inaccessible prior to TBC?