Hisoka - 3:58 pm on Mar 25, 2011 (gmt 0)

There's really no way to do it legitimately without Google's permission.

Of course, if you're looking for shady ways, you have to use over 100 proxies, get rid of cookies after every visit, and make sure you don't hit it too often in a short period of time. It's very possible to scrape Google 24/7 if you have lots of proxies in your disposal, and you change your keywords often