I like the installation options on a mac: you have the official app store, but you don't have to use it. In theory, Android could also offer different marketpl

I like the installation options on a mac: you have the official app store, but you don't have to use it. In theory, Android could also offer different marketplaces, one where the apps are carefully reviewed, and another where anything goes. Keeps the choices, but also supports safe downloading to those who want to be careful. (Ok, Android already _does_ have multiple app stores, but I don't think of any particular one as "the official reviewed marketplace," which is what I'm after.)