essxjay, I bought the Neutrogena mineral powder foundation for travel. I think it's just OK, and will suffice for my use in travel. The packaging is really annoying (the brush is at the top of the powder, so you have to tap the package to get the powder to the brush, and you end up spilling a lot of powder the first few times you use it), and the coverage is pretty light. That said, it held up pretty well in humidity. I'm going to keep using it until it's done, and then maybe I'll try a powder-cream foundation.

Has anyone used Aveda's Hair Potion? I saw it last night at a store -- it's definitely a powder inside what looks like a gel bottle.