Tapworthy or keys for great iPhone (and other) apps

Just had some time to watch this O'Reilly Webcast: Tapworthy - Designing iPhone Interfaces for Delight and Usability (Link) and found it really useful, so thought it would be a good idea to share it and also keep it on my Blog for future reference.. Josh Clark (Twitter @globalmoxie and web http://www.globalmoxie.com) makes a quick resume in just about 1:20 hours of key points of an iPhone application, but that can also be applied to any mobile platform as well.

Key aspects to consider:

What makes an app mobile?
- Micro tasking app.: small apps for small (but relevant) tasks 
- Local: apps to enhance my local experience 
- Bored: “pastime” apps.

How can we create “Tapworthy” apps:
- Focus on mobile context
- Optimize for micro-tasking
- Use sensors to enhance local context
- Create opportunities for exploration
- Complex != complicated
- Do one thing and do it well

And finally work on “Finger-friendly” design:
- Use the thumb's hot zone
- Design to a 44-point rhythm (font size)
- Be generous with space
- Content at top, controls at bottom
- Avoid scrolling where practical
- Put secondary controls behind hidden doors

As said, very interesting bits of information that suggest reading Josh’s book must be worth it! In the meantime, the video is a fast and free way to get some very good advice.