Don't worry. Just because the Mac is up to speed with Unicode 4.0+ standards, doesn't mean that MS won't be sometime soon. It just gives us a better advantage to grab those symbol domains and even domains in ranges from newly encoded character sets for languages that just got approved, that people aren't aware of in that other world.
I just got stuck with another issue however.
Apparently Windows users don't know how to type things like ¢ that are a simple key stroke away on the Mac!
http://www.dnforum.com/f298/25-com-thread-137590.html