I think having not only your api key displayed but a QR code version of it displayed (or a link to a website that can generate it automatically) would be nice for mobile purposes. I'm currently in a test phase of a native Android application that monitors SABNzbd and it utilizes a QR scanner to input the very long api key. It'd be nice if SABNzbd could produce this QR code automatically or create a link that sends out the api key to a website that generates qr codes (and it would be nice for whomever uses my application). This could also be beneficial to other SABNzbd mobile applications since they could also implement a QR scanner and prevent their users from having to type them in manually.
However, having a user enter in an API key doesn't seem to happen very often so I don't really expect this feature request to gain much traction with the developers but I'd though I would give it a shot