Yesterday, I posed the question on Twitter whether there was an app that would allow you to download all of your Flickr photos to your desktop. I was quickly answered by Jay900, who pointed me to Flickrdown. I used it last night, and it is awesome!
The only thing that I can see that this app needs is some RSS support. My idea is something like an RSS reader, but it automatically downloads any new photos directly to your machine. No need to go in and select the new ones. I'm sure this is possible, and if I had any idea how to implement this, I would.
You could even go as far as having a separate folder for photos that you tag. The app would recognize the tag (for example, the tag "print"), and then you could know that you want to print that photo. Then uploading it to a store like Walgreens would be a snap.
Basically, I take a lot of photos with my phone and send them to Flickr, so those pics rarely actually get saved on my hard drive.
Anyway, it's a great program and I recommend it if you use Flickr with your phone.