[jjshabado]

No. They serve two very different purposes. At work we use both IM and email. IM is good for quick questions and coordination issues. Email lets you go into more detail, and lets you reach a lot of people quickly. It also a lot easier to refer back to emails over IMs.

There is no way a significant number of businesses will allow myspace/facebook communication. Its not secure, it has a ton of distractions, and they can't trace it.