The extensive use of HTML5 is great and all, but including font files in your cache manifest (http://www.20thingsilearned.com/cache.manifest http://www.20things

The extensive use of HTML5 is great and all, but including font files in your cache manifest (http://www.20thingsilearned.com/cache.manifest http://www.20thingsilearned.com/cache.manifest) seems like an inappropriate use of the offline cache (better fit for normal caching), unless you're absolutely sure the user doesn't already have the font installed (e.g. custom font made just for the app).