>I can understand $10.00/hr thing, but how do they become an expert at so many things?
Very easy
Let give you an example
Plamen Ivanov UT member 47341
He start programing in C++.
In University his favourite tools become VB.
He is VB/SQL MCSD and VB.Net/ASP.Net/SQL MCAD and MCSD
C# is close to VB.Net and for him is not problem to write in it
Is he an expert? You can ask a community or to read some of his articles at UT magazine