Makes Me Wish I Wrote More Letters

I recently discovered Letterheady and Letters of Note, sister sites that appeal to both my appreciation for retro/vintage coolness and my hoarder instincts.

For example, I totally want a ton of this Muppet Show Fan Club letterhead:

I also like the Campbell's Soup letterhead.

The archive of the letters ... Well, that's just one of those rabbit holes on teh Interwebs that I can fall down and not come out of until several hours later. Just fascinating stuff, really.