I find it very necessary to have a clipboard manager in Ubuntu, I use to use Parcellite in Ubuntu 10.10 but it doesn't appear to work in Ubuntu 11.04. Diodon is a clipboard manager that pretty much looks and behaves like Parcellite. To install Diodon just throw the following into a Terminal.
The icons located in Unities top panel are located in the following Directory:
/usr/share/icons
You would now have to select the Theme folder you are currently using, the default theme would be the ubuntu-mono-dark folder. These icons are spread through out all the folders inside here, you'll have to play match up for each of the icons.
You want to change the icons in the folder that reads 22 for instance, say you wanted to change the icon at the top right, the power off icon, you would move into the following directory:
/usr/share/icons/ubuntu-mono-dark/actions/22
These Icons are 22x22 in size, you can change it's color using Gimp or replace them with a whole new icon.
You might have to play with scaling them down to suite your likes, Since Gimp don't like the .svg extension, you'll first have to save it as a .png then rename it to match the icons name you are replacing.
Ubuntu 11.04 has the option to open a terminal in the current directory when you click on File, however I prefer the Right Click method, if you do to then just throw the following into Terminal: