Peter from Backyard Organic Farming has recently started cultivating dragon fruit cactus - you know, the fruit that Andrea thought mirrored David Bowie's hairstyle.

These tree-like cacti, Hylocereus undatus, produce the most amazing fruit commonly referred to as dragon fruit. Admittedly, I have never tasted one but they are touted as the new fruit of the gods - maybe the gods were getting bored with sapotes and could no longer endure the smell of durian!

Greenhouse Girl has a great wrap-up post on how to grow these awesome fruit trees. They can even be propagated from seed!