To my mind, the biggest problem is uniqueness. How many different ways are there to design a "Foo::Simple" module? I'd suggest a name such as Config::Simple really doesn't tell anyone what they need to know, and rather only reflects who grabbed the name first.
As I understand it, perl6 will help solve this problem (or at least swap it for some new ones) by including the author as part of the significant namespace. That will free you up to release "Config::Reader" - to concentrate the name on what it does rather than how it does it.