Where are people getting the art for their cards?
well - i like a special style of dominion pictures, more fantasy like (f.i. laboratory, alchemist, herbalist, market square, death cart f.i.).
When i find an interesting picture at fan cards, i use google to find more.
I give you an actual example:
I take underground market from chappy7:
I make a screenshot of the picture
and insert it into google images search:
and here they are:
enough similar pictures.
So i collect interesting pictures for future cards and save them (with source/website).