I run talk_bingo which is largely modeled after thingswithwings fabulous kink version, and this has given me things to think about as well. My nod to accessibility thus far has been to make it clear that people who can't use .gif bingo cards can have a text only version, but that's just the tip of the iceberg. I'll be working on some further explication of how the challenge can be approached by people (like myself) with limited spoons.

Thank you for a new vista of thought.