Dear James,
Here is a pretty good site on
Motor Learning.
This is a fairly comprehensive
slide show (PowerPoint Presentation) with 43 slides on the concepts.
This
Study shows the relative efficacy of random pracrtice as superior to a block of practice, one of the key components to motor learning theory.
This
Article gives a good look at Motor Learning in the context of rugby.
There are two main texts, that of
Richard Schmidt and that of
Richard Magill.
Cheers!
Geoff Mangum
Putting Theorist and Instructor