Google AdWords has finally launched a standalone tool where advertisers can get traffic and cost information for keywords without needing to login to their AdWords accounts to do so. Data included in the results are keywords/minimum bid, maximum CPC/predicted status, search volume, estimated average CPC, estimated ad positions, potential clicks per day and potential cost per day.
This is a nice answer to some of the various tools available that estimate cost per click and traffic on PPC keywords. I am sure this tool will also get some mileage by Google AdSense publishers wanting to check out the cost per click for the keywords they are attempting to target their webpages to.
Do keep in mind that account history and settings will not be taken into account while using this tool, however it is a great way to quickly check on keywords without needing to login.