WOODSIDE, Calif. -- Here, he's from another planet. Here in Silicon Valley, David Kralik is, let's face it, some strange import. That's why he's attracting such buzz one recent afternoon inside Buck's, the legendary eatery, while lunching on a pulled-pork sandwich. -snip- Yep, that's Kralik. A lifelong Republican in the land of liberal Democrats. Who relocated from uptight, Brooks Brothers Washington. And works for Newt Gingrich. Then after giving an abbreviated history of Buck's (Hotmail, Netscape, PayPal, et al., scribbled their first business plans here; Oracle co-founder Larry Ellison and Al Gore stop by sometimes), MacNiven goes for the kill:...