I am a professional photographer and collaborate with others on image repair and finalization, including the client. Here are some features that I would find useful.

• Reference my workspace as a folder/library from my desktop applications, e.g. Photoshop.
• Use the LIVE Spaces Image Upload IE add-in or something similar
• Have the ability to apply multiple comments for an image file
• Use digital ink to write notes on an image annotation layer supplied by the site
• Create folder hierarchies for multiple file types. E.g. the top level is a photographey client, under this are folders for documents and images. Under the image folder are folders for images in different states from RAW to Final
• Create alerts on a folder, a folder tree or an individual
• Have an interactive task list per client and be able to link a task to one or more files or images
• Create an image library with an image browser similar to Live Spaces for clients to access. Perhaps simply make a specific Spaces Album available in a Workspace with added functionality!!!
• Be able to allow a client access to only their images using the image browser, perhaps by allowing access to the folder to facilitate a conversation that allows the client to request specific changes to an image
• Allow a client to set a toggle on each image, such as Order (Y/N), an image format such as JPG, TIFF, or Print, and input notes for each image. This could be a general capability that the workspace owner can customize similar to a workspace list. Perhaps this is simply a form that appears for each image. Each form would be reflected as a row in the custom list. I gusee you could use the List to create the customized columns and then post it as a form on the image review page. Provide a List column type of Image Thumbnail and automatically generate thumbnails for the image linked to the row (another feature, of course). This would be VERY COOL as it would allow organization of the work for a specific set of client images!!!
• Automatically set an expiration date for images and files and archive them to my  PC then delete them upon expiration
• Provide a synchronization capability between the site and my PC for all site contents
• Link the client workspace to the Account record in Outlook's Business Contact manager
• Allos me to click on a button in Business Contact Manager to create a predefined template client workspace

Jeffrey, I posted for people to reread your post. Thought it was the only way to say I WANT THESE FEATURES TOO, then I discovered the reply button with your message. Thanks for scripting so clearly what is needed in your industry.