At this stage it would be not certain as to which countries will compete. That will only become clear when the 2012 Olympics come closer. A lot can happen in the next 4 years that could determine who will attend them.
Answer #2
204 countries are participating in 2012 summer Olympics.
There will be a total of 205 countries are competing in the London 2012 Olympics.1000
there are 204 nations competing in this olympics
205 countries are participating in 2012 summer olympics.
205
18
204 countries will be competing.
205
more then 50
205
There are 204 countries see related link
Snowboarding will be part of the 2014 winter Olympics
There will be 205 countries competing in the Beijing Olympics.