Since September of 2007, Google haven't seen their shares bust past $700, until last week. Google saw a 52-week high of $712.25 on Friday, where it floated back down to $706.15 at the end of trading on Friday.
Google's record high was in November 2007, where they hit $747.24. Google have had a great run recently, where they've seen their shares bounce up by around 19% since their last reported earnings, where they showed some strong earnings thanks to their core advertising business.
In the last couple of months, we've seen the stellar Nexus 7 making waves, which is helping Google. We should see some great things from Google in the coming months.