This looks amazing, I can't wait to try it out. My main problem with Thunderbird is that it doesn't have a conversation-based UI, but this looks like it does. Good stuff!
(By the way, typo: "accessable" should be "accessible")
(By the way, typo: "accessable" should be "accessible")
[1]: https://addons.mozilla.org/en-US/thunderbird/addon/gmail-con...