For the full backup experience, you should download the Allmydata native client which provides some good features including:
- Backup thousands of files simply with a drag and drop
- Automatic backup scheduling
- Restore multiple files and directories at once
- Backup your Outlook emails even while checking them
Trying the options provided from the menu started the browser and pointed it to a local server listening to port 8666. The software application was updated a couple of weeks ago, but I found the following piece of information in the Allmydata FAQ: "Allmydata works on Windows XP and Windows 2000 operating systems". I hope the guys behind the project will update the application soon.
Overall, Allmydata as a web service is a pretty straightforward and useful application. While I would prefer drag and drop features in the web interface, while dealing with files it isn't a problem of using good old check the box and click action routine.