XboxONE.ms leads to xbox.com and has Microsoft's details in the WhoIs - it was registered for just 1 year about 15 mins before the announcement. But .com and .net are both owned by someone who got them in 2011 and currently they sit as Go Daddy splash pages. .co.uk was bought on 21st May this year by an obvious opportunist. XboxONE.org is a fan/news thing named in the style of bungie.org.
I know buying up a load of domains would have made it a bit obvious what the name was, but seriously if you don't have a crack team ready to register them all in the 15 mins before the announcement then you can't really care too much. I'm sure they will try and use their lawyers to just get them forcibly transferred to Microsoft, so maybe they figured it didn't matter.
It was already hard to search for things about Original Xbox stuff without having 360 things dilute the results. Now it'll be next to impossible unless you filter the search range to pre 2006 or something. I don't suppose anyone can remember which western themed game on original xbox had a glitch/feature where you could ride your horse from the start of the game right to the final cut scene/credits by going over a couple of hills or something? Was it a Call of Juarez, GUN or Read Dead thing, or something else?