I saw this tip the other day:
1) Bring a large pan of water to a simmer.
2) place the whole eggs in the water for 10 secs, then get them out.
3) When you can handle them, crack them into the water and poach for 1 1/2 to 2 minutes.
They are awesome...
The initial dunk gels the white enough that it doesn't spread in the water, any longer than 10 secs and the outermost layer of white cooks enough to stick to the shell and gets left behind.
Dave