Use clearer variables names in the example

[appsforartists]

In the example, the taxPercent store is setup thusly:

this.on('setTaxPercent', function(percent, value) {
  return value
})

percent is a confusing name, since presumably both values are percentages. Since this is an example, clarity is especially important. I suggest state and payload, to maintain the convention used throughout the rest of the document. oldPercent and newPercent would also be good choices.

[appsforartists]

Similarly, getTotal should be called totalGetter, to match the preceding section:

var over100Getter = [
  getTotal,
  function(total) {
    return total > 100
  }
]

reactor.observe(over100Getter, function(isOver100) {
  if (isOver100) {
    alert('Shopping cart over 100!')
  }
})

[appsforartists]

And this should be reactor.ReactMixin:

var React = require('react')

var ShoppingCart = React.createClass({
  mixins: [react.ReactMixin],

[appsforartists]

syncronously should be synchronously.

[appsforartists]

Utilties should be Utilities

[jordangarcia]

Hi!

Thanks for suggesting these changes. Feel free to open a PR and I will gladly merge.

Otherwise I will make these changes later this week.