Thank you all for your replies. I am going to look at POE and Coroutine in the future, because it looks like they would both solve this problem. However, I've found a alternative to running all of these commands that serves me better.

I'm going to use the Sun::Solaris::Kstat module to pull all of these stats, and update at the same time. So it'll take a matter of nanoseconds to get all the stats I need every five seconds instead of having to wait on shell commands.

It'll be pretty sweet when its done. Look for it on freshmeat!