I had made a test modification to the membercard in XF1 which would display the contents of a custom field as the last "cell" of the membercard, and it worked out well enough. However, when I upgraded the test forum to XF2, I lost that modification.
In XF2, I can't seem to find what the new...
A look at my member cards layout. Re-designed the default xenForo member card layout and integrated with Covers by ThemeHouse. Removed avatars completely, hidden stats until icon is clicked, used FontAwesome, Glyphicons and Material icons in various places.
Socialize Your MemberCard
First, FontAwesome must be in your PAGE_CONTAINER. Open that template, under <head>, add:
<link href="//netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.css" rel="stylesheet">
You must create a Custom UserField for each Social Site you plan on using...