I don't know about leprechauns, but the dropbox service, at least the free 2GB with bonus for every friend, is good for me too. I have currently 4 devices synced (including my phone) and all files are available either being on or off line.

Also there is a special function that allows files in the local Dropbox folder on the Hard disk, to be shared on demand. Just right click on the selected file in the folder and click on the 'Share Drobox link' . Then the link is copied in the clipboard.

I think similar idea is the iCloud or SkyDrive.

Ioannis