first of all, congratulations.
personally I think I'd have kept pretty quiet if I won, to avoid a lot of fuss and just tell my closest friends and family.
if you feel like doing something for the people you love, that's only natural, but like someone said, you really don't owe it to anyone (unless you do owe someone LOL).
I think I'd make an event/party for friends and family and let them know that'll be their "gift". hire a band, get some good food, celebrate in style (it'll still be a relatively small amount of money spent).
let them have something like that... and maybe a bit bigger christmas presents this year.
OR, you can tell them you just payed off your debts and gave the rest to the poor
(whether you did or not)