Ask HN: Feedback on new Web App idea - File Approval

Notice I said file approval, and not document approval. I was thinking about starting work on a web app that enables you to easily create an approval workflow. Say for example you have a document, and are a college student who wants a few people to review your essay. With this app, you would create a workflow, where people A,B,C and D receive your doc in an email. All they have to reply to it with update versions and you get it back. This is the simplest use case.

Here's a more complex use case. You have a new banner you want to use, but you need to get it approved by the three people in the QA team for feedback, then sent to the designer again (to implement changes), and then back to you. After you approve it again, it gets sent to the CTO, then CEO. After the CEO approves, you get a notification with any feedback they may have left.

Initially it would be a one way flow (which might be an issue for a lot of users), so if you want, you can restart the process. The aim is to keep it simple. No sign up necessary for anyone except the initiator. Just reply to the email. The initiator can also see the current status of the documents. I can think of 100s of feature I can add, but that for another time. Do you think this is worth pursuing?

http://www.agilewords.com/ is somewhat similar, but its more of a collaboration system, and only for documents. This can be used for literally anything.