Many of the images used in the Jovial Priest blog have been purchased from istockphoto.com using the Standard License.
I believe I satisfy the Standard License as given below:
Online or electronic publications or uses, including web pages to a maximum image size of 800 x 600 pixels; video image size limitation is 640 x 480. Any size reproduction is acceptable with substantial changes to the content.
And from an email clarification I was told:
It is required that the image be embedded in your project that will be digitally distributed.
It is important to mention that this license doesn't grant any rights to the recipient.
So if you like it - purchase it.
Any other images used in the Jovial Priest I will try and at least to link to the source, if copyright is not my own.