If you did not hear, apple released the MobileMe iDisk App, of course you will need a mobile me account. OSX users really should have one, let me list the benefits:

- get an new email address ( you choose what it is ) belonging to the .me domain
- can set up galleries through iphoto and upload your pictures to it for anyone to see.
- get a website that you can manipulate with iWeb.
- get 20 GB of space to share between your website/pictures/email or whatever else you want
- get access to a backup application tht will backup whatever files you want to the iDisk ( after it is set up)
If you have an iPhone you can track it if it is ever lost

And the best part? Its all in sync and push enabled (Email , contacts, calendar)

When you have MobileMe installed on OSX or Windows, goto your settings/control panel and make sure you are logged in and iDisk is set up. You should see it under devices in finder or under my computer in Windows.
So either use Itunes to search for the MobileMe IDisk app or use your iPhone/iTouch device to install the device (app store).
Its a great tool to keep your files accessible to you wherever you go.