This article about braking on tandems is interesting in itself, particularly if you ride a tandem, but Thorn, a UK bike building company, is well worth a look at for rugged solos and tandems they build.
And for the keen tandemists, Thorn are the world's supplier of 48 spoke Rohloff hubs, which they do sell to Australia, as with their bikes, if you ask nicely and send a few dollars over too.
Take a look at this article and at the Thorn site:
Tandem braking: http://www.thorncycles.co.uk/tandembraking.html
Thorn home page: http://www.thorncycles.co.uk/index.html