Just rumors. If he was a member of a Prince Hall lodge, I imagine that lodge would be shouting it to the high heavens.
I had never heard your suggestion that BO was, but here is a link that suggests he is a 32 degree Prince Hall mason.
http://www.cephas-library.com/masonry_obama_32nd_degree_prince_hall_mason.html
I know nothing about Prince Hall, so cannot say anything about authenticity.
At times I seem to answer my own questions:
Found the source on the rumor which follows-
Written by Dzenan Causevic
From http://www.sarajevo-x.com/forum/viewtopic.php?t=36907
(This is a blog in Sarajevo-)
Suspect it is Croatian, which would explain the negative tone toward Masonry of all kinds. I cannot read the text on most of the blog, only this article.
This article is very suspect. I am now pretty certain it is totally wrong.
Truth in the Balkans is rare.
I have tried to study that region for years to understand why it is so volatile, but came to the conclusion that honest history of the region is impossible. I have sympathy with the Serbs, but hated who ruled them.
A very good friend of mine (also a Mason) knew the area well, his father was from Lebanon. He was stationed in the Balkans after WWII. He spoke Arabic well and was well versed with the conflicts of the region.