Ability to store signatures for users

When a user submits a new Ad. Is there a way they can have a pre-set signature (or a choice of multiple) that has all of their contact details and web links etc. So that they don't need to type this every time? If not I think this would be a valuable addition to RS Directory.

I would also vote that this could somehow fall into the core description field. I don't know how, but that's where I need it. Maybe have just a radiobox below the description field, and the chosen signature gets injected into the Ad at the end.