Apple iPhone OS 3.1.2 is a minor update over iPhone OS 3.0. It addresses three bugs: one that prevents the iPhone from waking after it's gone into sleep, another that requires you to turn the phone off and back on again to regain a lost network connection, and another that causes the phone to crash when streaming video.

iPhone OS 3.0 is an update to the operating system for Apple's iPhone that focuses mostly on adding features long-demanded by iPhone owners and critics alike. For example, MMS (multi-media-messaging) will finally be implemented, so you'll be able to send images, sound files, and even GPS coordinates to your friends via text message.

Another much-anticipated addition is the ability to copy, cut, and paste text from any field in any application to any other. For example, you could pull a website address from the Safari web browser and paste a link to it in a text message or an e-mail.

Push notifications have also been added, so some apps will be able to tell you when something happens that demands your attention even if you've already returned to the home screen or opened another application. IM apps (like Meebo, which was announced at the event) will benefit from this in particular, but the potential uses are broad.

Apple boasts that the update adds over 100 new features. An early version is available to app developers today, but the public won't get it until sometime this summer. It will be free for all existing iPhone owners and $9.95 for iPod touch owners. It's worth mentioning that while the update will be available for the first generation iPhone (the non-3G one), some features — such as MMS and stereo Bluetooth — will not be available.

Head over to the Product Details page to see our list of some of the other features 3.0 adds to the phone.