Here's what your list of folders would look like on the Dropbox site. I've added an arrow that points to the Photos folder. You can also open Dropbox from your desktop or file manager, in which case it would look like any other window with a list of folders and files.
How often has someone asked if you could send them a copy of the photo you've just taken? It doesn't seem like an unreasonable request. After all, all you have to do is e-mail it to them. Except that if you're shooting RAW you'll have to convert it to JPEG first. You might even be tempted to adjust it a bit first so it looks the way you intended. And if you're shooting at anywhere near full resolution, you'll have to resize it so it won't choke their e-mail server. If you're sending several photos, e-mail really isn't an option. Then you're looking at either burning the images onto optical media and sending them the disc or uploading them to a website where they can access and download them.
I personally find uploading to a website to be the most convenient approach. Once I upload the photos, all I have to do is send the requester(s) a link to where to find the photos, then it's up to them to go get 'em. No muss, no fuss, no discs, no postage.
There are a variety of ways to set up such a website. The one I find the quickest and most hassle-free is Dropbox.What is basically is is an amount of disk space that you have reserved on a remote web server. Anything you upload to this server can be available to anyone you want to share it with, including yourself. Sharing with yourself is convenient because it allows access to the same files even if you're using multiple computers in multiple locations. The only "catch" is that because Dropbox is web-based you have to Internet access to access the files.
It costs nothing to sign-up for Dropbox and the first 2GB of space are free. Two gigs can store a hell of a lot of JPEGs, especially when you're just using it as a temporary place to upload files until whoever asked for them has had a chance to view and download them. To do this, you send an e-mail invitation to whomever you want to grant access to a shared folder. Your invitees will only have access to folders you specifically share with them. Anything else is private and visible only to you.
Another convenient aspect to Dropbox is that it resides as a folder on your desktop, taskbar, finder, or wherever else you choose to replicate it. All it takes to move files is to select, drag, and drop--hence the name "Dropbox." It doesn't get much easier than that. And just in case you're wondering, I have no financial or otherwise self-serving interest in recommonding Dropbox. I don't get any money or extra GB of space if you use it or not. I just like using it and think you might too. Another other Dropbox users out there who would like to share your experiences, pro and con, should feel free to leave a comment.