I typically do some variation of the following:
The attached paper says:
Welcome to Newport Avenue
Decorating a new home is exciting.
So is meeting new neighbors.
When we are sitting on our front porch,
it is an open invitation to come over and visit with us.
Cindy & Steve
A cordial greeting goes a long way toward breaking the ice and assimilating new folks into our neighborhood.
It also serves as a great opportunity to get some of our most pressing "Gladys Kravitz" questions answered quickly!