Bare Minerals is great! Pretty medium coverage, but i dont think mineral lasts all day so you would have to re-apply it throughout. Also you can check out some youtube videos on reviews and mineral application if you need to learn!
Bare Escentuals Mineral Foundation is one of the most popular mineral foundations and it comes in the original version which gives your face a slight "sheen" type finish and it comes in a matte version for oilier skintypes or for people who prefer a matte finish. You can find an excellent get-started kit which has all the basic essentials that you need to begin using a mineral makeup at: http://sephora.com/browse/product.jhtml?id=P220533
Smashbox Halo is also an excellent mineral powder foundation. It gives the same "glowing" finish as the BE original formula, but Halo comes in a compact that is a lot less messy to work with than the BE. You can take a look at it at: http://sephora.com/browse/product.jhtml?id=P228100
I hope this helps you.