internal interrupts?

Does anybody have any experience with/can anyone point me to some examples using internal interrupts?

I've seen the general examples with regard to turning on and off interrupts, but it would be nice if I could just have my function go off (say every 10ms) based on an internal interrupt. Specifically, what I am looking at doing is developing a consistant, well defined integration period to generate position data from my gyro rate data.

P.S - (I am actually using a wiring board, but have found no luck on their forums, and was hoping that the similarity between the two boards might lead to a solution).

Thanks Everyone, in advance!

.jim

see this post
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1162726448