I guess the answer to this might be iChat, but I've got two iMacs on my home network. My wife and I work on them, usually at the same time, and it would be great if we could just open a quick chat window to swap small files, links and bits of text back and forth as we work. At the moment we use the Finder and copy, paste, drag, etc. But there must be a quicker way. Back in the olde days there used to be a network message thing you could use. I guess iChat would be easiest if we both set up a login each and keep it running in the background?