I've been working on smart card integration into Seahorse, and as part of that we need icons for smart cards. I had fun putting together something today:
Obviously not perfect, but I'm happy with the result. The tools and info in gnome-icon-theme are really nice.
At some point when the illustrious icon designers get a chance, it'd be cool to have a smart card icon in gnome-icon-theme. I imagine they'd want to fix it up or replace it. But for now this will live in the gcr library.
NLnet is sponsoring my employer Collabora to work on basic smart card viewing and simple management in Seahorse. Shortly I'll be posting more goodies coming related to this, including stuff that fixes up Seahorse for casual users as well.