This is the Verizon thread so...
Hah, POTD.
And yes, while it's not a question of IF, because it's practically a given that it will be offered overseas (Or at least be available to get because there will be GSM versions), there isn't any news on release dates/rumored release dates for any other market than the US (AFAIK).
Here is the release information for the N1 and NS though, you can take it as a speculation piece:
N1:
US, UK, Hong Kong January 5, 2010
Canada March 16, 2010
Singapore April 30, 2010
Germany May 25, 2010
Italy May 28, 2010
South Korea July 10, 2010
NS:
United States December 16, 2010
UK December 22, 2010; (Vodafone & Unlocked)
Canada April 7, 2011; WIND Mobile, Mobilicity, Telus, Koodo Mobile & Rogers Wireless
Serbia April 4, 2011
Thailand April 1, 2011; AIS (Advanced Info Service)
Source: Wikipedia