here's a simple command to grab all photos off the iphone (tested on 4s) to linux.
apt-get install gphoto2
gphoto2 --auto-detect -P -R
apt-get install gphoto2
gphoto2 --auto-detect -P -R
| picasa_3.0.5724-01_amd64.deb | 2008-Oct-27 12:21:39 | 29.7M | application/x-debian-package |
| picasa_3.0.5724-01_i386.deb | 2008-Oct-27 12:20:12 | 29.8M | application/x-debian-package |
| picasa_3.0.5744-02_amd64.deb | 2011-Jan-24 08:59:33 | 30.3M | application/x-debian-package |
| picasa_3.0.5744-02_i386.deb | 2011-Jan-24 09:00:16 | 30.3M | application/x-debian-package |