Then, the Superior Court decided to take a second look. Upon reconsideration, in 2011, the Superior Court reversed course in an 8-1 opinion. So, such correspondence appeared to be safe . . . but, wait! What about the Supreme Court of Pennsylvania ("SCOPA" to the cool kids)!?
Well, wouldn't ya just know it? The Supreme Court decided the case this week . . . a 3-3 split! The end result is that the latest Superior Court decision (protecting the correspondence from discovery) is affirmed. You can read the opinion in favor of affirming here, opposed here, and the final order here.
If you're wondering why we have an even-numbered panel at the Supreme Court - it's because Justice Orie-Melvin did not participate (it's a long story).