We all know Steve Jobs sculpted the iPhone from unicorn tears through a sheer act of singular will and hutzpah -- along with buying FingerWorks and winning a glove-full of multi-touch patents of their own along the way (which may or may not still result in several rounds of pugilism with Palm's Pre).
Ars shows you how to create a Push-based Twitter update notification system for the iPhone without actually showing you any of the details due to the ongoing NDA. (But don't worry, we tell you exactly where to find the instructions.)
Again with the Google! This time it's GV Mobile (short for Google Voice, the re-branded Grand Central service) and the above video comes courtesy of Sean Kovacs.
If it's a correct reflection of what we'll see when/if GV Mobile hits the App Store, then it seems to be focused primarily on using Google Voice to make almost Skype-like calls. Google Voice is, of course, far more than a simple calling service, so you also get SMS sending (receiving is handled via the built-in, default iPhone SMS/Messages app), as well as voicemail.