I just bought an all-in-one printer (Canon PIXMA MP500) a few hours ago and connected it to my iMac. It installed flawlessly and works great.
One reason I bought this printer is to be able to scan documents and save them as PDFs. That way, I can easily backup all of my important documents (not to mention throwing away those that aren’t needed anymore). Not to mention, using Spotlight I can easily find what could take hours going through a drawer of folders.
A cool trick I discovered thanks to Macworld is the ability to Combine PDF files using Automator. Since I didn’t get a document feeder, this option is a lifesaver. This was my first time using Automator and it is really cool. Only thing I changed from the Macworld example was making it move the combined PDF to the desktop afterwards.