In reply to a post by AlanH:

It's measurably faster here

Same here, everything seems to be just a touch quicker than it was before.

I installed 3.0 on my iPhone and it's killed the wifi. Have tried a complete reload but still does not work. Went to make an appointment with Apple in Milton Keynes and the next one is Monday between 12 and 1. No good to me.

Will be looking for a replacement phone.

Conor, have you tried re-setting your network settings? You will have to re-enter your wifi password afterwards.

Not a general issue - wifi still working strong on my upgraded 3G phone.
Regards
jawdrops

Same here, but some people, including Conor, seem to have had a problem and a Network reset seems to solve it.

Hi yes i did try that. Reset network, reinstalled os but still no joy. Ended up having the phone replaced as it was a hardware issue.

I too had a complete WiFi failure whilst running 3.0 Beta 5; swapped out within minutes be a Genius at an Applestore.