i have no update this week, because i am confusing with my implementaion of the certificates part.
I intended to implement it using gnome-keyring, howerver, it seems that its far away from the topic of my GSoC application:)
i have no idea about the integration of Seahorse and gnome-keyring.
We have a meetup at Google office in Beijing last monday, and some guys give me a lot of useful suggestions. So i thought a lot about that ideas, the UI of GPG Key selection part may be chenged accordingly.
Hope next week there will be some good news.