> How is that substantially easier than a crystal and two caps or a single
> ceramic resonator with internal caps?  Those canned oscillators are bulky,
> expensive, use a lot of power, and glitch the supply.  At the minimum you
> need two parts, the oscillator and the bypass cap.

I would hardly describe these as taking up more square inches (or mm if you 
prefer) than a crystal and a couple of capacitors.

http://onecall.farnell.com/1276643/passives/product.us0?sku=rakon-cfps-39ib-20-0mhz&_requestid=42065

The only problem I see is the 20mA draw. 

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