how smart will wireless be in FC5?

[Jack Howarth]

   Does anyone know if the following will be possible in FC5? I
am interested in being able to set up a portable Linux box such
that if the ethernet interface is available the internet access
will be used through eth0 otherwise the wireless interface will be used.
Currently in Fedora Core 4, it seems that I am stuck with either
automatically enabling both interfaces at startup or manually
starting one or the other. What I am trying to avoid is having
both interfaces in use if the ethernet interface comes up at startup.
Thanks in advance for any information.
       Jack