Live-Share is a simple, fast and free file hosting and sharing service. I just got registered, it works well with firefox (doesn’t work with safari). Anonymous users are given 300MB and registered users get 500MB of free storage. It’s really simple to use, all you got to do is:
1. Select your file and press upload
2. Receive download-link and share it
Currently the interface is clean but the terms says "advertisements will be displayed on all pages", so I guess ads will start to appear soon. Easy to use but would be great with some features like: grouping, tagging and password protection, if I wanted to share some confidential information. Anyway, it’s simple, free and works well.