While pure Al and Al-based compounds do affect brain chemistry (Audus) and grey matter peroxidation (Fraga, Oteiza, and et al), there is no direct correlation between brain lipid peroxidation, increased permeability of the blood brain barrier and all of the other interesting things that aluminum does to your brain, and encephalopathy (brain disease). That being said, Al2O3 (Aluminum oxide) is a very hard substance. It is used for high grit sandpaper, for sanding metal. As a sailor, I have had to attempt to polish it or sand it off of aluminum hulls, and that is not fun, let me tell ya. If you boil vinegar in your kettle you are creating aluminum acetate which is a completely different subject.
Not being a neurologist but merely an overeducated military member, I see it this way: Aluminum is harmful, yes. Studies show this. The thing that really saves your bacon is that Al is not soluble in water, so it cannot poison you in this way. There you go; some simple research leaves you with interesting data, provided you are willing to look up all of the definitions of the various neuroscience terms in the abstracts.
To break it all down? You're probably fine using Al pots and pans. And I'll keep using my aluminum sandwiched SS boil kettle. Which is exactly what everyone else said. Have fun, make some good brews.
Works Cited:
Audus, Kenneth. "ScienceDirect.com." Aluminum effects on brain microvessel endothelial cell monolayer permeability. University of Kansas, 21 Jan 1988. Web. 17 Jun 2012. <http://www.sciencedirect.com/science/article/pii/0378517388902955>.
Fraga, , Oteiza, and et al. "Uk Pubmed Central." Effects of aluminum on brain lipid peroxidation. University of California Berkley, 1990. Web. 17 Jun 2012. <http://ukpmc.ac.uk/abstract/MED/2330606>.