I think the only cultural references I see are football-result nostalgia. Quite a few do still crop up though (and even more so, almost every day I get an ad for a Ceefax inspired mug with my team's results on it).
I too have fond memories of using Ceefax for my football news pre-internet - the ones I remember were I think "302" for general football homepage or "310" for Scottish football scores.
