From looking at the press reports it does look as though the Euro has finished, and Britain quite rightly stayed out of it However, I can't see how Germany leaving the Euro will help them. Germany is an export driven high tech manufacturing economy, and is still doing well compared to most Euro economies. Any new German currency will be very strong, institutions will buy it and investors will buy German Government bonds, which in turn will continue to push up its value. This will hurt German exports as they will become more expensive for the international markets to buy. This has also been a problem for Japan recently as despite the problems caused by the aftermath of the tsunami, the Yen is trading at a high and is hurting Japanese exports.
IMO I think that Germany would be far better off trying to fix the mess in the Eurozone by guaranteeing more of it's debt. It might not be fair on the German taxpayer, but they helped create the monster that is the Euro, so they should fix it.
On the other hand, a strong German currency may help British exporters if our products are cheaper than theirs
The truth is, it's a real mess and no one knows how to solve it