[quote=Blitzkrieg]
Those urls had a lot of extra shit in them.
[/quote]

I can tell...

Though now they're fixed.

Yeah that's basically the main theory why they are gone and it's basically is what I believe happened though I think that the deadra intervened and wiped them out or they succeeded but are trapped in another plane of existence ("purgatory" as ghosts)... My final theory came from Skyrim, which is like Alduin they were sent forward in time to a very distant era due to succeeding in striking the heart... The first two theories, in my opinion, are more likely to happen than the third. 

Though I think that it's safe to assume that no matter what they would have been the most powerful race in all of Nirn if they were left alive to continue their work for godship. 

Finally though, I think that if the Dwemer were to ever come back (some very fucking magical way), our favorite NPC, M'aiq the liar, would say something and let us know.