Haven't done it yet, but its a fettle-in-waiting:
Replace the existing brake hose on the front brake of the Double Fixed TrailMonster
TM with a similar, but slightly longer (about 6") hose; people keep banging on about how easy it is to bleed and service Shimano hydraulics, so I'll soon find out if they're right. On the plus side, they use mineral oil now, which is significantly less nasty than DOT fluid
1Also sorely tempted to bodge scythes, switchblades or something equally bladeiferous onto the axles of the Green Machine in light of last week's nettle-tastic bushwhacking experience
Sadly, napalm isn't very bike portable ...
1 - I have it on good authority from a Tour Divide veteran that vegetable oil can be used in a pinch. I have no desire to find out if this is true.