It is a late reply, but I hope it is okay. Estonia has adopted a Finnish style defense policy and I believe it is very wise considering our very limited resources. Soviet occupation ruined our economy and costs in money easy for rich countries are hard for us. Every male nowadays has to go to a 8 to 11 month military training (it used to be longer, but training was of lesser quality) and we have weapons caches hidden in all our forests. Forests cover more than half of Estonian territory. In addition to this we have a large unpaid volunteer militia where people can keep on training on how to defend our land.
It is not so easy as we have to be very wise in where we spend our money. Estonia has 725 times smaller GDP than USA so there are no mistakes allowed when we want to build a credible defense against Russia. If NATO bails on their obligations we will die in a futile fight.
I hope this will not happen. I'll post a video of our volunteer militia training to lighten the gloomy mood.
http://www.youtube.com/watch?v=otQ3fmG9YUI