When my brother was looking for work early last year, we wrote a small application (using Java:(, I hadn't discovered perl back then) that would trawl a list of company websites (supplied from a file) and look for their "Positions vacant", "Jobs", "Personnel required", "Work for us" pages and download any new ones it found for later consideration. It was pretty crude, but it saved him some time going through them manually.

One thing I can tell you, it would have been a whole heap easier to write in Perl.