My dds' always receive birthday cards a few days late from a couple of relatives.
Another still intends to bring Christmas presents from 07 next month.
Another annoyance is my sister who hasn't sent a card or present for dds for years - she doesn't even acknowledge the gifts we send to her (although we know she accepts them).
It does irritate me a little.
I always make sure to send things early (hope that doesn't sound smug).