It appears that Google is testing placing 10 Google Sitelinks within some mobile devices. I have taken a screen shot of this experiment on Danny’s smartphone.
I cannot reproduce this on either my iPhone, on normal Google search or even using Google mobile search.
Postscript: It appears that this is not just limited to mobile. BigMouthMedia spotted this using a normal web browser. It appears that this is a limited test based on possibly the data center you hit or your ISP.
Postscript 2: We now have confirmation that Google has increased the number of sitelinks to eight (it looked like 10 in our screencap, but some of those were a single link wrapped to multiple lines).