[wp-hackers] Running a script

[Dan Gayle]

I know this may seem trivial to some, but I have a php script that I  
need to have run every time some accesses my blog. It's a script that  
updates info from an XML feed, and I could set it up as a cron job.  
But since the feed works best if it is pulling data real time, I want  
to attach it to Wordpress so that whenever WP is accessed, the script  
runs.

Can someone point me in the right direction? Thanks.