3 questions pls for an upcoming upgrade

Hi there,
I like the simplicity of the plugin. Thank you.
For a future (very near future I hope!) can you please see if you can integrate the following?
1. As was requested by others – allow for Canada (and the world) for the donor’s home.
2. Are you able to integrate the Thank you letter to be generated as a pdf attachment?
3. In the Thank you letter section – can you add a section for a digital signature (i.e. upload a jpg of a signature, along with some words like Director name etc…
I think you are doing a great job – but I would really need these updates to use this plugin – even as a paid version!
Thank you.

http://wordpress.org/plugins/seamless-donations/