Acceleration Problems

What is your question?

I have a 2001 S80 Volvo. Randomly my car will just "cut out" and I can no longer accelerate. RPM maxs at about 1500 when this happens. I then pull over, turn the car off, wait and minute, start the car again, and it is fine until the next time it occurs. Could be right away, or might not happen for the rest of the day. Anybody have any insight into this problem?