Germany is the third country to where Portugal exports. http://www.indexmundi.com/portugal/exports.html
And Spain is the biggest partner, and France as big as Germany.
Portugal Exports - partners: Spain 25.2%, Germany 13.8%, France 12.2%, UK 5%, Angola 5% (2009)
And that is the meaning of it ? Nothing in special.
Do the German's drink more Wine from Portugal, if the Wines from Spain, France and Italy are also reduced in their price because Germany has left the Euro Zone ?
If Mercedes sells less cars and buys less leather and fine wood from Portugal for the seats and dashboards, is this a positive Effect ?
Econ 101 may give a general hint, but the real effects may differ, depending on the good exported and imported - and even by company.
So if generally Portugal will profit from an Euro Zone without Germany because Germany is the third country to where Portugal exports... how much bigger will be the benefit for the prime Import Partners ?
Germany: Imports - partners: China 9.7%, Netherlands 8.4%, France 7.6%, US 5.7%, Italy 5.2%, UK 4.7%, Belgium 4.2%, Austria 4.1%, Switzerland 4.1% (2009 est.)
Netherlands Exports - partners: Germany 26%, Belgium 13%, France 9.2%, UK 7.7%, Italy 4.9% (2009)
France Exports - partners: Germany 16.4%, Italy 8.2%, Belgium 7.7%, Spain 7.6%, UK 6.8%, US 5.1%, Netherlands 4.2% (2009)
Italy Exports - partners: Germany 13%, France 11.6%, US 6%, Spain 5.9%, UK 5.2%, Switzerland 4.7% (2009)
Belgium Exports - partners: Germany 19.1%, France 17%, Netherlands 12.2%, UK 7.2%, US 5.3%, Italy 4.7% (2009)
Austria Exports - partners: Germany 32.1%, Italy 7.9%, Switzerland 4.8%, France 4.2%, Czech Republic 4.1% (2009)
Spain Exports - partners: France 18.7%, Germany 10.7%, Portugal 9.1%, Italy 9%, UK 6.3% (2009)
If you want to apply Econ 101 the real profiteers from a Euro Zone without Germany would be these Nations, not Greece or Portugal.
And if the effect on Portugal and Greece is big enough to save them ?
If the investors on day came to the conclusion that there is a real chance Germany isn't able to pay the interest because the German Economy has massive problems or because the German Government doesn't seem to care about the debt any more... well when the Interesting Times ( as in the Chinese Proverb ) will start - not only for Germany, but for the whole Euro Zone... 
Bah. Those times are not going to happen. The Euro is a glorified Mark anyway.
Your fate in the German Economy and the wisdom of the next Federal Government of Germany is bigger than mine

I'm cynical about it. Using the actual low interest rates for German Bonds to spend more money and hope what nobody will notice it until the next elections are over would be a logical thing for any politician.
And even than you can always blame the American Rating Agency's the greedy Banksters and the 1% when the problems start.