I think I answered my own question with a look on the wibble web.
The 22pF capacitors are the load capacitance (44pF because the caps are in parallel) that the crystal needs to oscillate at 16Mhz. You have have other 16Mhz crystals that need require a different load capacitance, like FOXLF160-20 from http://foxonline.com/pdfs/hc49ulf.pdf.
Someone please correct me if I am wrong, I think this will greatly clear this post up.