It also confirmed that the 16 GB version had already sold out online.

The website for new or existing O2 customers to get their hands on the latest Apple iPhone with 3G connectivity when it is launched in the UK this Friday went live at 8am on Monday.

An O2 spokeswoman told IT PRO she did not have any figures on how many customers successfully registered an order before “the site was not able to cope with the exceedingly high demand.”

“Although we were prepared for high demand, we’re working to get the site back up as soon as possible,” she added.

But she also echoed the “temporarily unavailable” notice currently greeting those eager to buy or upgrade to the new iPhone through the O2 online shop by recommending they get down to their nearest O2 store early from 8.02am this Friday 11 June.

O2 has split its 3G iPhone stock evenly between its stores and web shop. But it maintains it will be able to meet demand in-store on Friday.

Apple have released an OS X firmware update 1.1.4 for the iPhone, saying little about the new features. The last update, 1.1.3, introduced a few new capabilities such as the ability to customize the home page, but the only thing noted as new in 1.1.4 are “bug fixes,” according to Apple.

It’s not clear whether the new update does anything to the legions of jailbroken and unlocked iPhones out in the world, but if you’re one of those users living outside Apple’s user agreement, you might want to hold off installing the update until more details are available. We’ll update if we hear more.

In addition, we’ve learned nothing new about Apple’s iPhone software development kit, expected to arrive sometime this week before the end of February. It was a busy day for the company, though, with the new updated MacBooks and MacBook Pros making an appearance in Apple stores.