Tom,
Have you heard of 4shared before?
http://www.4shared.com/
It is a free uploading site that I have been using for about 6- 7 months, with no problems. You can store up to 15GB for free. When you upload a new file, it automatically produces a download link.
Once someone selects your link that you post in a thread or email, a 4shared page will appear. After selecting the file link showed on the new 4Shared page, you have to wait 20 seconds before another link appears. Once you click on that link, the file will download.
What I like about 4Shared, is that no spam pop-up windows appear when clicking on their links. That's why I enjoy using it. There are other free file storage web sites out there however, they have all of those pop-up windows, which drive me nuts, plus you never know what is hiding behind those pop-up windows!
Chad