Write a song about it.
One of the verses should contain:
I opened up the packages, unaware
they weren't addressed to me, I swear
Penthouse letters, "A Hot Affair"
Keeping them myself would be unfair...
Unless you want to share?
Make sure you confront your neighbor as he comes in with his wife, gf, so, children or pastor.
Also, present the items with a flourish at the appropriate time.
Videotape the whole thing and when your neighbor denies that the items in question belong to him auction the video tape along with the package on ebay.
Alternatively, send them to your fan in NJ :)