Clicking noise under acceleration, driveshaft problems?

Hey guys, I have a problem that just started yesterday. I drove to the gym and when I started my car and drove off in 1st, a clicking noise started coming from underneath my car. As I accelerated, it just kept getting faster and faster. Started off like click....click....click then went click.click.click going through gears. No matter what speed I go, the clicking noise just continues. Any ideas on what the problem is? I was thinking that it might be the driveshaft? The sound seems to be coming from directly underneath the driver's seat. Any help is greatly appreciated.
 
If you push in the clutch does it go away? Does the car still drive normal? If so, its probably either a pilot bearing or throw out bearing. Pretty common problem...mine does this. On mine after about 2500 rpm, it goes away. The majority opinion is that its not a big deal.