I organise all of the above for my (very large) extended family, including sending photos and children's cards to elderly relatives abroad, organising presents and parcels, and making the children do thankyou letters after Christmas and birthdays.
Dh is pretty slack about organising this kind of stuff for his relatives -- one elderly aunt sends him quite a generous cheque on Christmas and birthdays, and he hardly ever writes to thank her, despite my nagging him. Left to his own devices he would just about manage Christmas pressies for his mum and dad, but no more. I organise Christmas/birthday presents and cards for BIL's children, but draw the line at doing this for adult relatives.
I'm slightly stunned by the number of MNers who seem to take responsibility for social duties wrt in-laws -- am I just shirking my duties as a good wife and DIL, or should a man sort out contact with his family himself?