I've found that I have managed to avoid instances of phone tag ever since social networking got really huge. I always hated having conversations via answering machines but with the ability to leave instant messages on a profile there is a sense of accountability there. It is easy to ignore a private message on your phone and call back to another answering machine. I think that having that message out there for everyone to see really cuts back on issues. I think more businesses should get on with work social networking. I can imagine it would save a ton of time and money.