As a long-time Sunnyvale resident, I'd just like to say welcome, I hope you enjoy your stay, and keep the noise down, please.
:-)
I've got no idea what you enjoy doing, but lessee. Best movie theater is the Mercado, near 101 and Great America. Best Mexican food is La Fiesta in Mountain View (Villa Avenue, I think). Best burrito is La Costena at Rengstorff and Middlefield in MV (looks like a supermarket, but has a kitchen in the back). Best bookstore nearby is Borders at El Camino and Mathilda.
(Googled "sunnyvale blog", ran across your comment that way)