I made my own soil for cranberries based on what was around but they haven't been planted yet so no guarantee of sucess, it may even turn out a disaster. 30% dead leaves, 30% compost and 30% earth (possibly pine poisoned but what the hey, might even help) and the rest, sand. I also mixed in a few handfulls of grass to aid decomposition and mixed it up in rainwater which won't raise the pH like tap water. It now sits in my back yard in the cold weather, which won't exactly aid decomposition, thinking about it. I've also got doubts about the calcium content of the sand.
All that because I wouldn't know peat if I was standing on it, despite reading a lot about it and my area being basically made of it. I found out a lot of historical facts about peat and my area though.
Well, I'm interested in anything else I could add to reduce the pH. Horse manure, seaweed, superacid... these things I can get.