Six Apart recently added another notch to its belt of supported mobile devices. The company's Movable Type weblog publishing system and hosted TypePad blogging service now support the iPhone. You could already blog from both of these systems with a Symbian OS, Windows Mobile or Palm OS PDA and smartphone.

Through a iPhone-specific plug-in for Movable Type and a just launched iPhone portal, i.typepad.com, for TypePad, Six Apart customers can now create and edit posts, manage comments on their blogs, and configure settings for sending photos directly from their iPhone or iPod Touch—essentially an iPhone without the phone component.

Because both the Movable Type and TypePad use the same iPhone-optimized interface, there's a welcome consistency of implementation for those who blog from both platforms.

It was only a matter of time before a major blogging company like Six Apart extended its platform to the iPhone. With more than a million iPhones shipped already, many bloggers no doubt already have one in their hands.

And, unlike the virtual keyboards developed for other mobile devices, the one included with the iPhone is very useable; albeit you can't type nearly as quickly as with most hardware-based typers—:;particularly RIM's masterfully-designed thumb-keyboard for the BlackBerry.

You can use the iPhone's soft keyboard not just for writing e-mails, text messages, entering URLs, jotting down notes, etc., but for blogging as well .