Glad you'll be fasting too! Company always helps :)
I tried the Master-Cleanse about 5 months back, but it just wasn't for me. I lasted only six days. It was good in a way since I lost 12 lbs those 6 days, but the biggest problem with it is that the lemonade made me sick and I had no appetite. The taste of it would make me gag and throw up. But many people have been extremely successful with it, so I guess I'm a very small minority.
As for water fasting, you're very brave! I couldn't do more than 2 or 3 days....I keep getting scared of electrolyte loss. One day I drank only water till night, and I could feel irregular heart beats and shakiness. That's made me scared of doing an extended water fast.
Anyway, see you around! Look forward to when you start along with us.