The Arabic phrase, insh'allah, can be either full of meaning or meaningless - it depends on the context and on the person who is speaking. Insh'allah is one of the most common Arabic phrases used in everyday conversation. Uses range from "insh'allah I will meet you at 8:00 for football," to "insh'allah you will have a healthy child soon." Insh'allah means, "if it is God's will." The correct use, according to my Arabic friends, is to wish someone good fortune in an endeavor, or to assure a friend or business associate you will do everything in your power to complete a task.
When I hear insh'allah from upper management though, I am sometimes discouraged. If someone says insh'allah he can mean that he really does not want to do this thing or that it cannot be done... in other words, the commitment or deadline will only be met if there is divine intervention.
So to take insh'allah as "yes" or "for sure" every time is too optimistic. "Inshallah, the labs will be open in August 2009," or "insh'allah you will have all of your books for the fall semester," or "insh'allah the gym will be open next week"... are all improper uses of insh'allah.
I still like the phrase insh'allah - we have a similar concept in the New Testemant (Injeel), as found in the book of James, chapter 4.
Insh'allah reminds us that in life, we do not have the final word. Insh'allah means that I realize I am not all-powerful and I do not know everything; I am only a man. I will do everything in my power, but I am only a man. If God allows this to happen, it will happen. If he does not, then it will not.
That reminds me of a story from early in Christian history. After Jesus was taken up to heaven, the religious leaders in Judea wanted to kill the Christians, but there was one religious leader named Gamaliel who spoke out against the persecution.
Acts, chapter 4:
So... insh'allah I will graduate in May, inshallah I will get a good job afterward, and insh'allah I will see my family again soon. Ultimately though, it matters more what God wants more than what I want, and that is comforting in a way.