While it IS fun to get correspondence from programs/chairmen/residents, do NOT, under ANY CIRCUMSTANCE, craft your ranklist based on whomever or whatever contacts you (or not). Most programs do NOT make any communication, and you'd be rather silly to not rank your favorite program at the top because it didn't give you a call/letter/email/etc.
I was told by the infamous PD at UMKC: "We send out emails alerting our top 10 that they are, in fact, in our top 10. This is NOT a guarantee that you'll match and, for that matter, if you're number 10 you will probably NOT match here... we're just giving you information so that you'll know."
As for anecdotal evidence (which is the N=1 of a meta-analysis): I got a couple of post-interview contacts, and I still matched at my number 1 which didn't give out the time-of-day after interviews.
It's to the programs' advantage to contact you, not yours.