Venture capitalist and web A-lister Guy Kawasaki recently got back the publishing rights for his very first book - The Macintosh Way - (the first of 9) and he's giving it out for free to whoever follows him on Twitter. Brilliant.

Aside from the obvious instant-follower-base-growing factor, I think it's a good lesson on the fact that it's nice to somehow reward your existing followers every now and then...