Hey Mac laptop users.........

[skurk]

I haven't had any problems with my Macbook to this date.

What do you mean by "maintaining a wireless connection" anyway - it disconnects you every now and then?

Do you boot Windows using Bootcamp, or are you running it in a VM like VMWare or Parallels?

The Amiga emulation, is it under MacOSX or Windows?

[skurk]

Like SteveSMS said, try an update and see if that works.

If not, open Terminal and ping some hosts when you're "offline".  Can you ping your router?  Can you ping any external sites?

You say the websites are unavailable, but the Airport card is working.  The first thing that struck me was that your DNS servers are unstable.  Are your network settings different in MacOS and Windows?