it is again possible to jailbreak your iphone if you made the mistake of upgrading the OS to 3.1.3 (or broke your phone and had to buy a new one that already had the damn thing on there). spirit is a small (4,464 KB), free application that jailbreaks your iphone with the click of one button in ~30 seconds including the reboot. it will also jailbreak your ipad but i won't know the amount of time that it takes until mine arrives next week :) (edit: ipad jailbreak ~15 seconds)
recommended applications once your device is free from the controlling, icy grips of apple:
- infinidock - dock as many applications as you please (well worth the $.99 cents)
- five column springboard - five columns of apps on every screen instead of four (free) (edit: note - do not install this on an ipad. it will add a fifth column but all of your icons will squish together)
- sbsettings - bossprefs 2.0. slide your finger across the top of the screen to access all of your phone information and change configure any setting you can imagine (free)
- backgrounder - run applications in the background. from experience, this is much more useful if you have a 3GS that can handle it (free)
- mxtube - save youtube videos to your phone (free)
- yourtube - like mxtube but integrated with existing youtube app ($2.00)
- lockdock - launch applications from your lock screen ($2.00)
- installous -don't feel like paying for that appstore application? get it for free using installous (free)
- appsync -include cracked applications when you backup/restore your iphone (free)
the latter two apps require you to first add the hackulo repository (from cydia: manage -> sources -> edit -> add, enter cydia.hackulo.us and click 'add source')