- Create groups of contacts to mail a couple of people at once (or integrate googlegroups ;)
- Have the spellchecker spell the message's subject, too
- Group conversations by whatever term is reocurring in a Mail (not just "Re:"s)
- Possibility to export mails from GMail to my harddrive
- More sophisticated message-filters
- More complex keyboard navigation, maybe even configurable (there's no shortcut to go to the sent folder, e.g.)
- Some Feed (RSS or whatever) to be able fetch the amount of new mails in my inbox
- Allow more sender-details at the messages head (not just "Foo Bar to me" with Foo Bar's email address as tooltip, but rather a "Foo Bar <foo_bar@foobar.org> to me") - make this configurable
- Progress bar for Attachment uploads (and another message than "Document contains no data" to moan about too large attachments)
