The new category (or topic) in Top Stories navigator at
http://news.google.com/news?ned=us

is http://news.google.com/news?ned=us&topic=my

pointing to 20 different news about the disaster, at time of writing.

Weird and pointless. It's just a shortcut to this search:
http://news.google.com/news?hl=en&q=myanmar+OR+burma&btnG=Search

Oh, and "Click here to support the victims of the cyclone in Myanmar (Burma)" should be replaced with "Support the victims of the cyclone in Myanmar (Burma)!".

Maybe, the search myanmar OR burma gives
"Results 1 – 10 of about 72,857 for myanmar | burma. (0.26 seconds)"
i.e. 72857 hits, however.