Does anyone know a good Online storage services site that is free?
box.net is an awesome service, allowing 1GB of free space and lots more at a low cost. They also let you edit documents, spreadsheets, etc. from right inside their website without needing any software installed. You can send and share files as well.
MediaFire?
Windows Live Skydrive is what I use and it has saved me a few times. If you have a Windows Live account, you can use that to log in there. It has 25GB FREE online storage.
If you use SkyDrive, here's a useful software : http://www.cloudstorageexplorer.com/
It allows you to have your SkyDrive directly into Windows Explorer - like if it was a physical drive.