Str82u - 1:01 pm on Dec 23, 2012 (gmt 0)
Honestly, others may say I'm wrong, but if Google's sending the traffic to your site's index page are you sure you want to change it? What are your bounce rates like when they send the user's there and do the users make it to the page with the information they need?
EDIT: and what you'd said about your sitelinks @Ellie, thanks for the clarity - that's very interesting to know. Your link optimization worked though!