Does Hebrews 1 say that prophecy ended?

I recently saw (once again) the oft-repeated claim made by cessationists that Hebrews 1:1-2 proves  the gift of prophecy is no longer valid, or that there are no more prophets. I intend to briefly demonstrate why that claim is in error. Buckle your seat belts, though, because we're going to get a little nerdy, diving into the biblical language of Koine Greek.

Here are the verses under discussion in a handful of common English translations:

Long ago, at many times and in many ways, God spoke to our fathers by the prophets, but in these last days he has spoken to us by his Son, whom he appointed the heir of all things, through whom also he created the world. (ESV)

In the past God spoke to our ancestors through the prophets at many times and in various ways, but in these last days he has spoken to us by his Son, whom he appointed heir of all things, and through whom also he made the universe. (NIV)

A Few More Issues with "Cultural Christians in the Early Church"

In my post "What is a Christian Book Editor's Job." I addressed a handful of issues I encountered in the early part of Nady Williams' book Cultural Christians in the Early Church. Most of the rest of the book was decent, but I ran into a few more major quibbles near the end.