If you want to upload a lot of documents to Google Docs, it's difficult to upload them one by one. You can send the documents by email, but this option is not very reliable and not all the formats are supported.
Google Docs has an API that lets you upload, download and edit documents, but there aren't many applications that use it. One of these applications is Google Docs Batch Upload, developed by Anton Beloglazov. It's a command-line Java application, so it should work in Windows, Mac, Linux, as long as you have JRE 1.6.
Google Docs Batch Upload lets you upload all the files supported by Google Docs from one of your folders. Use the following command to upload all the files from a folder and all its subfolders (unfortunately, the application doesn't recreate the folder structure in Google Docs):
java -jar google-docs-upload-1.0.jar <path> --recursive
(replace <path> with the path to the folder you want to upload)
In other news, documents will not be editable from 12:00 to 1:30 pm PST, according to the Google Apps Status Dashboard.