[ Thanks to kiterunner for this link.
“Faenza icon theme for Natty PPA has already been updated and
now its the turn of Equinox themes for Ubuntu 11.04 to be released.
And the latest Equinox theme pack, created by Tiheum(who also
created beautiful Faenza icon theme) comes with 3 brand new themes
– Equinox Dawn, Equinox Dusk and Equinox Midnight respectively.
“Equinox theme pack adds 3 more themes namely Evolution Dawn,
Evolution Dusk and Evolution Midnight respectively taking the total
number of Equinox themes to 5. The latest iteration of Equinox
Evolution themes has also updated the PPA for Ubuntu 11.04 Natty
Narwhal which makes the installation of Equinox Evolution themes in
Ubuntu 11.04 a breeze.”