Apple opens preorders for OS X 10.6 Snow Leopard
Long-touted as 'just' a behind-the-scenes update, Snow Leopard features support for Microsoft Exchange, a re-written Finder and an all-new QuickTime player with hardware acceleration and built-in YouTube uploading. There's also a tonne of new developer technologies to allow developers to handle multi-processor machines with Grand Central, and an all-round speed increase for all the OS components.
Snow Leopard pricing, aside from the aforementioned $29 upgrade from 10.5 Leopard, look like this: $49 for a Family Pack (5 licenses), and $169 for the Mac Box Set. The Box Set includes Snow Leopard, iLife '09 and iWork '09, and allows you to upgrade from Tiger. Remember, Snow Leopard is the first Intel-only version of OS X, so you're out of luck if you're still using a G4 or a G5.