This works very nicely. This is probably the most refined and well designed Chrome extension I've ever seen. Great job! You may want to gray/hide 'Clear all' when nothing new is showing up.

Does it also do reddit's http://www.reddit.com/message/moderator/ mail? Will it ping Gmail a lot? I stopping using any Gmail extensions because Google treats frequent queries as bots and blocks the originating IP for hours.

Also, nice name :) For well over a decade, I've been doing things under the name 'chime' so it's a bit weird when I see someone else create apps with that name.