Tapping noise (in head?) - sound clip

[Hypr5]

Sound clip: (The video has some wierd clicking in it, but you can hear the car's noise at the end over the video noise.

http://img532.imageshack.us/my.php?image=noisemy7.flv
The noise is toward the end.

Finally finished the head gasket job and triple checked the timing. Turned it over 3 - 5 times with a wrench and double checked with the cam locking tool / flywheel pin and it was still lined up. I started it up and it runs smooth, but now I hear a tap tap tap noise and it dos increase with engine speed. It's pretty loud.

It sounds like it's only coming from the front. Around the chain area. Maybe slightly further back. Does this sound like lifter noise or chain noise or ... what does it sound like to you guys?

Thanks!