Yahoo allows your ad campaigns to be downloaded as a spreadsheet. Can you edit this and then upload it to alter your campaigns? How about Google, or MSN?
Yes, kind of & yes. For yahoo, the spreadsheet template you need to use can be found here - https://secure.overture.com/templates/bulkupload/pm/en_US/USTemplate.xls. And instructions here - https://secure.overture.com/help/upload.do. If you do a fair amount of business with them ($60k / annum I think), you should see a 'Bulk Upload' link on the account summary page which automates the process. If not, then you'll have to contact their customer services, and they might let you do a one-off limited volume upload. For Google, the new offline adWords editor is pretty handy, allowing you to setup new campaigns or edit existing campaigns on your desktop quickly & easily, then upload all your changes at once. Get it here - http://services.google.com/adwordseditor/intl/en-GB/. MSN allows you to upload keywords in a spreadsheet when creating or editing an order.