iPhone 2.0 Activation Fix. Get Through Server Overload

Here is the fix that finally got me through after hours of hitting the okay button on the -4 iTunes error message:

1) When the error message comes up hit okay, but Do Not Disconnect your iPhone.
2) Quit iTunes
3) Relaunch iTunes
4) Voila. If you had the same luck I did, you're likely breathing easier now just like me.

Hope this helps.