For me, I am planning for the following:

1. SwitchEasy RebelCelestial - got it already
2. Apple Universal Dock - so I can drop in and charge while the phone is still inside the case
3. Griffin PowerJolt for iPhone - in car charger, and it comes with additional ipod cable so I can bring that one on me - it's great value coz bundled

Don't plan to use screen protector, coz the iPhone has a glass screen and very hard to scratch those. CNet had a video when the iPhone was first launched and they put keys and coins into a bag with iPhone and rubbed and shook them - without scratch. I had a Motorola SLVR which uses glass screen, dropped the phone so many times and the screen has zero scratch. Can't say the same for the body though

Just receive my Paul Frank Case 

Back :
Front :

let go my 5 days old SGP Hard case, plz check at - http://forum.lowyat.net/index.php?showtopic=1119991&hl=3gs