Whatever became of the Schleswig-Holstein problem?

The 'Schleswig-Holstein Problem' was famously one of the intractable diplomatic concerns of the nineteenth century, a phrase redolent of Crimea, Bismarck, the Khyber Pass, the 'Great Game' and other concerns of the Victorian diplomat.

British Prime Minister Viscount Palmerston famously claimed that only three people understood it: Prince Albert (who was dead), a German professor (who had gone mad) and Palmerston himself (and he'd forgotten it).

Now, it seems that Schleswig-Holstein is back on the political agenda. Link: Guardian Unlimited | Guardian daily comment | Simon Tisdall: Danes look to master Schleswig again.