Hey, I was one of those 10,000! You had to be quick because I recall they had to turn away another 20,000 or so that didn't come in on time. What was cool about that IPO was that you had to pay $495 for those 33 shares. That was $15 a share. As demand crept up in the institutional market the offering price got upped to $18 BUT either because it would have been a logistical nightmare or because it just wouldn't be the cool thing to do they stuck to the $15 price for those who had gone through the coupon.
I was lucky enough to get out a few months later in the low $20's (I see the stock is at $16 now but it dipped into single digits a few times since then).
Garden Botanika did a similar deal, letting its shoppers in on the IPO (the company went belly up, I believe) -- and MP3.com also let the artists on its site in on the IPO.
I doubt Google would allow AdWords (or AdSense) clients in on the IPO. There is just too much demand to worry about the small fry, but, I'm with you, it would be an awfully cool gesture in empowering the Google fan with the deep pockets of Wall Street.