Hello everyone! Sorry I've been off the forums lately. I've been busy and without a computer, but I should be back on more frequently now.
Please let me know if you have any questions...I won't be responding to old questions as I'm not sure whether or not they may have been answered (ok, ok...I'm just lazy and taking advantage of the situation

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One thing from this page...I do not remember anything about mashing in aluminum (or posting about it, for that matter.) I'd think it would be fine. Please let me know if anyone has information to the contrary, I'm curious.
This is my personal philosophy, and has nothing to do with brewing ideology, but I go out of my way to never cook with aluminum.
Cooking in general, and I assume the same goes for brewing, but aluminum can leach out of the cookware and into the food. This is at higher temps and after more use. Can you make good beer in an aluminum kettle, sure, but I would avoid using it in the long term. I cook with either cast iron or glass/ceramic. Stainless steel can take the extreme temperatures for cooking, and I have no problem cooking/brewing with it.
Aluminum is a vary bad metal to have inside the body and specifically the brain. It can lead to Alzheimers disease.
http://www.ehow.com/facts_4914271_what-dangers-aluminum-cooking-utensils.html
It is the extreme temperatures that cause the aluminum to leech out of the cookware and into the food. I am not sure if the danger extends to aluminum foil, as the heat index on it is so low, the heat really just passes through it. If I burn the foil though, I am cautious.
In addition to cooking, I stay away from antiperspirant (not deodorant, specifically antiperspirant) If you look, the main ingredient is aluminum based, and long term studies have shown it can deposit it in the body. If you look at what antiperspirant is, it is the same thing as deck (wood) sealant.
Many may think of paranoia, but it's my philosophy, and I just try to stay away when I have the option. You won't die from brewing with aluminum though.
I can't imagine that there would be any OTHER reason not to use aluminum.