Masquerade dropdown in dqx adminmenu.

Issue Summary

I would love to see a masquerade dropdown in my administration menu.
This would show your personal favourite masquerade targets, that can be configured per user or site-wide.
(typically you want one masquerade target per role)
The click would trigger a form submit, not a simple link url, to avoid csrf.

I am egoistic, so I want this to be in
http://drupal.org/project/dqx_adminmenu
much more than in admin_menu.

I just wonder, should this be part of dqx_adminmenu, or part of masquerade?
At least the interface/logic for choosing your favourite masquerade users would be better off in masquerade, so it can be reused for other purposes - such as, a plugin for admin_menu, or a sidebar block.

Are you interested to help me out on this?
I would do the menu plugin, while you would tell me how I can get the list.