We sometimes get them at work. It's a very nice touch when they are personal, but overkill when they are basically handwritten form letters that go to everyone who was in the meeting. It can get to the point that you wonder why they don't have better things to do with their time and why they need to try so hard (to get our money).
For some reason, the ones I remember are the ones who actually remember the assistants at holiday time. :-)
BTW - I remember the days when you always sent a followup letter after a job interview, although they were usually typed.