That's becoming a common thing to do around here too. The invitation says things like "Just you spending the time with us is your gift" I usually still do bring some sort of little gift, not the typical gift I'd ordinarily give but something like a book or some sort of educational type thing like flash cards. I feel weird not bringing a gift to a party.

We've even been invited to kids parties around the holidays that say bring an unwrapped toy for donation or money for this cause. Nice idea, but I still bring a gift for the kid who most likely doesn't get why no one is giving him/her gifts.