Current IM platforms work just as well for that, aside from the fact people are starting to not like Facebook and half your friends might not have it. The main

Current IM platforms work just as well for that, aside from the fact people are starting to not like Facebook and half your friends might not have it. The main problem is if you don't have cell service and need to transfer a file, or if the file is on a machine without IM set up for some reason or another.