I find it really weird that we've been left without email for so long and no updates from them.
If you want to appeal to power users and developers, consider adding these features:
* Support for development mailing lists * Good patch/diff syntax highlighting for code reviews via email * Plain text compose and reading experience (many devs prefer this over HTML)
These additions would open your app to a whole different segment of mailbox users who rely heavily on email for technical collaboration.
That is, if these features aren't already included.