Wine certifications

[anna]

What are the differences, advantages, and disadvantages of these certifications? I've been told they help give you an edge in the wine industry (I suppose they ensure some sort of minimum education), but how are they really viewed?

Certified Wine Educator (from Society of Wine Educators)

Certified Wine Judge (from American Wine Society)

Master Sommelier

Master of Wine (I understand this is like getting a Ph.D in wine!)

Thanks for any information you can provide!