Memorandum of understanding is 99 out of 100 times the first step in coming to a more solid agreement. It means the 2 companies have agreed that they have found some common ground that may benefit them both, and both are interested in continuing the effort towards some sort of partnership. A memorandum of understanding also usually includes an exclusivity clause that both parties will make the best effort to come to a mutual agreement between themselves before talking to someone else.
Really hasher Im beginning to doubt your business sense.