I would like it if people could access files that I put on acrobat.com without having to send them a link in an email. This is assuming that a file structure will be created in the future. People could then see all the files that I have created for them and download the ones they need. This could be done by creating a folder and granting access to certain email addresses. You could even take it a step further and create a login and password for each folder that you wanted to grant access to.

Example: I am a designer and I create 2 logos for 5 companies. I would create 5 "accessible folders", one for each company. Customer 1 would log on to the personal web address that I provide them such as "acrobat.com/angryape/customer1" . A login screen would pop up and after they login, they can see the 2 files that I uploaded for them to view. They can look at them on screen or download them. I would create folders, passwords and a web address for each customer.

Microsoft does something similar on skydrive. I think everyone has to have a live or hotmail account to access it though. If you wanted to have people get an acrobat.com account inorder to access the "accessible folder" it wouldn't be so bad. There is more value in an acrobat.com account, but just allowing me to create a password for a customer would make it much easier for less technical people.