Safari Tab Features

Hi guys...

when i used to be a windoze man before i saw the light, i used firefox, and i had a plugin called TabMixPlus...

it did lots of things with the tabs, but i really miss some of the fundamental features and was wondering if anyone knows a way to get a similar thing into safari?

things that i miss:

• double clicking a tab would duplicate it
• double clicking the tab bar would open a new tab
• middle clicking a tab closed it, but then middle clicking again on the tab bar would bring it back

i could live without the third one although i did like it... but does anyone know of a plugin/method to implement this functionality?