ANALOG KID  First impressions: Works as expected with my old Nikon D100. I was stunned, however, to see Activity Monitor reporting this software using 280% CPU while idling on my Mac Pro 2 x 2.66 GHz dual core. Using this and Aperture at the same time is impossible.  
(Version 2.0)

ANALOG KID  Nine nice icons ... but no Jolly Roger. Maybe there was a lapse of consciousness at Icon Factory between the decision to name the icon set "Jolly Roger" and when the icons were actually made.  
(Version 2)

ANALOG KID  Download is a .mpkg file with no readme explaining what it will install. You need to be daring and double-click the mysterious .mpkg file to get to the readme. The project site on Sourceforge has questions from users that have gone unanswered - including a question on how to uninstall PsyncX.

Free software is good! Backup utilities are good! Free backup utilities with no instructions nor developer follow-up to questions is not good!

PsyncX might be great, but I'm not brave enought to install it without instructions on what it does or how to uninstall it if I don't like it.  
(Version 2.2)

ANALOG KID  Simple and free. That it uses the rsync utility within OS X and doesn't re-invent the wheel is smart. It doesn't provide access to all of rsync's functions, but as a pre-1.0 release, arRsync provides the basics to do easy push-button back-ups of your User folder to a second hard disk; something every Mac owner should be doing.

I would like to see a user manual added to explain what the available options do.  
(Version 0.4.1)