If you have files strewn about Google Docs, Box.net and/or Dropbox and would like the convenience of managing them all in one place, check out Joukuu. Previously in beta and Windows-only, Joukuu now has a webapp for accessing your cloud storage accounts.
The Windows program we looked at previously, now called Joukuu Lite, offers more features than the webapp, such as dragging and dropping files between accounts and automatically categorising files. A new Joukuu Plus Windows download ($US59.99 but 50% off for a limited time) adds even more folder management and an unlimited number of accounts (so you could manage, for example, two Google Docs accounts and two Dropbox accounts in one place).
Though more limited, the new webapp doesn't require you install anything and it still has great features like direct editing of files from Joukuu Web, searching across all files and folders, and sharing files.
Here's the catch: Although it's free to join, to add more than one account on the webapp -- Google Docs plus Box.net plus Dropbox, for example -- you'll need to subscribe for $US40 a year ($20 if you sign up in the next 10 days). Since having access to more than one account is the whole point of this service, basically the webapp is not free. You can cancel your subscription within 14 days if you just want to give it a try.
Support for Skydrive, Sugarsync, Huddle and Zoho is coming soon, and could make subscribing to Joukuu Web or buying Joukuu Plus even more useful for some.