I always find the "Amoeba Issue" amusing. Growing up in Florida, I've been warned about Naegleri since I was a child. I've never understood why people contest the risk of infection. Don't underestimate the danger this summer as the temperatures are very hot earlier in the season.
On a side note, I was over at the Yacht Club on Sunday and there must have been about 20 children swimming and wading in the lake. My favorite child was the one holding on to the base of the "No Swimming" sign as his mother took his picture. Awesome....