Now this is pretty cool. MovableType now has an iPhone plugin. When you log in to your MT control panel from an iPhone, you get a nice iPhone-optimized interface automatically. This post was written using this new iPhone plugin – will edit in a bit from a PC to add a link to the plugin.
[edit] Forgot to add the link! http://www.movabletype.org/2007/09/one_more_reason_to_buy_an_ipho.html