I guess you can leave a .txt file on a samba\nfs\ftp\webdav server somewhere accessible by both machines?

Or rsync a directory on your devices to one on your desktop?

Or cl1p.net?

Create another account on your IM service of choice (ym? gtalk? even skype) for your home. On most of these, you don't even have to leave a client connected on the other end for this to work.

ps: setup vpn tunnel for the first 2 suggestions to break through your corporate firewall if possible.