Apple said it expects the iPad to be a "second gold rush" of app development as consumers rush to add content to their new devices, and it looks like Kleiner Perkins Caufield & Byers agrees: the venture capital firm just announced that it's expanding the iFund to $200 million to invest in iPad app development. If you'll recall, the iFund was originally announced alongside the iPhone OS 2.0 SDK, and provided $100 million in total investments to 14 iPhone app developers like Shazam, ngmoco, and Shopkick -- companies responsible for 18 apps that have hit the App Store Top 10. Keep in mind that this money was promised before the iPhone App Store was even launche
