Ok, just to let you know that I am using OS 3.0 on four platforms now: iPhone 2G, 3G, 3GS and iPod Touch 2G.
Most impressive is the new 3GS. We got already 4 of them in the office and we did not run into any issues so far! They are a lot faster than the 3G so far. Just opening apps, browsing long adress books, running time consuming searches – everything seems much smoother.
Jailbreaking the 2G and 3G was quite easy. Still, I had some issues getting the 3G jailbreaked with redsn0w: Sometimes the Cydia installation would be corrupted and could not be upgraded. I would use “Icy” instead or just re-install everything again.
PLEASE be aware that you should ALWAYS change the standard SSH passwords as soon as you install the SSH server (OpenSSH) on a jailbroken iPhone.

September 4th, 2010 at 1:21 am
As far as design goes, the fourth-generation model is noticeably lighter and thinner than previous generations.