I have never seen a post that mentioned cooking or smoking with acacia wood, this doesn't mean that it is not done or can't be done, but most likely because we have ready access to the more traditional smoking woods like hickory, apple, cherry and oak. You might try burning a bit of it to see how it smells and then perhaps grill a piece of chicken with it to see if it imparts any off flavors.
I would also like to see a picture of the tree and the cut wood simply because I don't believe I've ever seen it before.
This is a link to acacia tree info, is one of these what you are talking about?
I have been woodturning in England for the last few years and have turned bits of Acacia wood on a few occasions. The trees and not common and the wood is in short supply. I have also taken up smoking and since I have some of the wood in stock I will let you know how I get on