First, those wishing to see the most recent version, 'Whistle, And I'll Come To You, My Lad', is available on the BBC iPlayer until 31/12/10, and only in the UK, alas.
For those who have never read it, M.R. James's Oh, Whistle, And I'll Come To You, My Lad
Next, the Jonathan Miller version of 'Whistle And I'll Come To You', thanks to YouTube:
(This is Part One … subsequent parts also available online)
Robert Powell's very enjoyable retelling of the story, also thanks to YouTube:
And lastly, Robert Burns' poem: Whistle, And I'll Come To You, My Lad