You'd be much better off with a Pentium Dual-Core for that. Why go Atom in the mini?
You're correct:
http://www.newegg.com/Product/Product.aspx?Item=N82E16819116072
They'd get more bite for their buck if they go this route:
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115206
Both are 64 bit architecture compliant.
The Atom isn't 64 bit architecture compliant:
http://ark.intel.com/cpu.aspx?groupId=35460
Result: Atom is a no-show.
All CPUs moving forward for the Server and Desktop are 64 bit architecture compliant.