Weird iPhone 3 omission: still can't delete all images

I thought it was odd last October that OS X iPhone users didn't have an obvious way to delete all images from the phone "roll".

It's no trick on XP -- just mount the phone and delete. On OS X you have to know the Image Capture trick (you can delete without importing).

Even with OS 3 there's no phone UI for deleting all images.

I can't recall seeing any image capture device, phone or camera, that didn't support this.

Bizarre.