Now that Snow Leopard is out you might want to check to see if your existing software, printers, and scanners are compatible with Snow Leopard. There are two different sites that can assist you with this. The first being Apple’s Knowledge Base. They have two knowledge bases that will tell you what software is incompatible, and what printers and scanners are compatible. The second is Snow Leopard’s Wikidot site. This site is not affiliated with apple.com. Here you will find a list of compatible applications and their status.