The 2nd Beta build of 3.0 was released yesterday and is now happily sitting on my iPhone. Build 3.0 Beta 2 is significantly faster and more stable than 3.0 Beta 1 and push notifications actually work.
Most of the bugs listed in my original post are fixed :D.
Also, the folks over at the iPhone Dev Team have released a Jailbreak. This means that we can finally use unofficial tether applications (PDANet being my preferred) on the 3.0 OS.
In order to Jailbreak.. head on over to http://www.quickpwn.com/downloads and download the latest version. If you have an ‘activated’ contract iPhone, do not select ‘Activate’ in quickpwn or it will kill your baseband (you will get no signal).
Hope you guys enjoy as much as I am!
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Find me at @chrismaddern.