Google Docs has a great new feature that lets you export your document files in bulk. To use it, go to Google Docs and select the documents you want to export by checking the checkbox next to them. You'll then go to the More actions menu and select the Export... option:



You'll then get a dialog that lets you select the type of output format you want for each type of document. You can select the output format for each type of document, or you can select the links at the type to update them all to use MS Office format, OpenOffice formats, PDF, etc:



Once you have the output formats you want, click the Continue button and your export will start.