Right, firstly I apologise for the total n00b question (Yes, I am a n00b when it comes to Macs!) is Snow Leopard a free update using Apple Software Update? Or do we have to purchase it as a new OS from Apple? If so, does anyone know the Apple Education pricing for it?
Is it worth the upgrade? Are there many new features that would benefit us?
Man, I feel lost when it comes to Macs in comparison to Windows! :p

