You have to be logged in to dropbox to access it:
First, I have to download an executable, so it's Windows-only. Second, it needs access to an IMAP account I control.
Those are both strange design decisions, IMO. What is it doing? Scanning my mailbox, downloading the attachments, and then placing them in my Dropbox folder to sync?
If I only want emails in the "Dropbox" label/folder to get sent to my Dropbox account then I can just configure my mail client to forward all matching emails.
That seems easier on several levels. It's easier for the developer, because they don't have to manage downloadable software, versioning, etc. and it's easier for the end user because they don't need to download anything and don't need to grant access to their mail account.
The only way these design decisions make sense, IMO, is if this app was written before the Dropbox API, which may very well be the case. But now they should do it the sane way. :)
Just thought of a question: how does the app deal if you resend an item of the same name, but with internal changes? Does it reject the upload? Put it copy the new over the old? Rename? (I'm going to test myself, but I'm also curious what you think it should do.) I know that Dropbox can support changes, but I'm not sure how much of the API is available to developers.
Final update: revised files are handled perfectly (i.e., the item is updated with the same name and versions are available through Dropbox itself). Lovely.
But what is going on with the DropBox API? They have changed it around to require pre-approval: "At this time, only mobile apps that run natively on the device are being approved" https://www.dropbox.com/developers/announcements/6
The documentation on how to do the OAuth authorization is missing -- just the mobile method is up.
And this kind of documentation does not exactly inspire confidence: "Remember, if you ever feel you need to store their password, then you are doing it wrong. Very wrong. Storing passwords is evil, and makes us hate you"
Why not explain that if a user changes passwords your app will stop working. Why not respond with a .png of a CAPTCHA when authenticating with a password?
EDIT: I'm interested in the trademark implications mostly, are there any?