So ... what have you tried?

(Hint: LWP::Simple.)

Update: Please also get the gods permission to hammer PM - if it's a few odd requests, it'll probably be ok, but don't send dozens of requests in a short timeframe without their permission. You'll be using their bandwidth and CPU time to the detriment of, well, actual users. This goes along with the reason why Google has an API to use to do searches rather than allowing people to get their web pages programmatically.