During an update today which released the Runious Caves, In-Game Trading Cards also became available.
The first Card that can be obtained in-game is called Horne (Card #17) and will display at the bottom of the Profile page. There is currently no way to see what other players have collected, nor to compare (yet!). Limited information on the available cards can be found in the Book of Lore in your inventory.
Horne can be found while traversing the Ruinous Caves. There is a host of other things that this location introduced, so it'll get it's own announcement in due course.
Backers for our first Kickstarter Project were also awarded Kickstarter Backer (Card #101) today. Huzzah!