Wake me up when they finally generate those stupid migrations automatically (see <a href="http://south.aeracode.org/docs/tutorial/part1.html#changing-the-model" rel="nofollow">http://south.aeracode.org/docs/tutorial/part1.html#changing-...</a>).
I like that the author added a section on demystifying the magic involved in how reversible migrations actually work. I like knowing how things actually work behind the scenes. I'd like to see the Rails community put less emphasis on the magic and more on how things work.