Often though we need to make sure we are choosing the right method of communication for the right situation.

For clear facts and tasks plus communication that doesn't require much emotive input; email,Instant Message(IM) or leaving a messageboard post on BaseCamp should be ok.
This is fine when what is needed to be done is very concise and is results based.
The more uncertain or ambiguous the message, brainstorm or conversation and the more you need to convey emotion, we need to start looking and making phone calls, video chatting right up to face to face meetings.

Choosing the right method is almost as important as the message.
For Example… delivering really bad news via a txt message or email… the message is not as important as the method here as it shows a lack of respect or tact.

as always… USE YOUR BEST JUDGMENT!