Check out this information on GoDropBox from Lifehacker (no relation to DropBox) is an add-on for Google Apps that allows public uploads to your Google Docs account. The add-on provides a link you can send to anyone who has a file to upload, and will email you when they’ve uploaded a file.

The only users who can upload to your Google Docs account are the ones with the link, so you have a little control over who can upload. The user posting files can upload them one at a time or in batches, but they only see their uploads and the upload progress. When the files are finished, you’ll get an email and link to view them.

GoDropBox is free for organizations with fewer than 100 users, and gives each user 50MB to use. For larger uploads, $5/month will boost the cap to 2GB.