Basically this is a mashup to sit on top of the default Human Theme. I am using 8.10 (Ibex) so I don't know how it looks in others.
There are three changes that I think make things look fresher.
1. I replaced the browser icons for back, forward, refresh etc with the ones from the installed crux theme that look more modern.
2. I added the Ubuntu throbber from here: http://www.ubuntu-art.org/content/show.php/UbuntuHuman-throbber?content=67285
3. I added the Pidgin icon from here: http://www.gnome-look.org/content/show.php/Pidgin+Oxygen+Style?content=84627
I think this makes things look much nicer overall. Thought I would share it with you all.
Install in system > preferences > appearance as normal.