Most wanted Gmail features http://gmailfeatures.grytoyr.net/

From the site:

Most wanted Gmail features
... as voted by actual Gmail users!

What is the purpose of this site?

Remains to be seen. After using Gmail for a while, I decided that
something like this might be useful, or at the very least rather
interesting. Of course, if the Gmail team were to glance in this
direction before deciding what features to implement next, that would
be cool, too :)

Anyway, let's try to keep this "wish list" as representative of real
Gmail users as possible (no cheating!) and see what happens—it
certainly can't do any harm. Thanks.

  ¶ 10:54 PM