Paul from Modaco has updated the community on his latest Galaxy Nexus developments. This UI patch would allow users to set their navigation bar up so that it always shows a search button, a menu button on the left, a menu button on the right, both or all of them at the same time.
I’m sure many of you wouldn’t mind being able to customize this and we’re happy the development community has created an easy way to do it. You’ll need ADB, but everything else is pretty much straight forward from there. Find the instructions (installation and uninstall) and download links here: 22 Nov: UI patches (LHS / RHS / Both / Search Button / When Hidden) - Android @ MoDaCo
SOURCE: ***Official Galaxy Nexus Pre-Release thread*** (Link to lastest inside info: (11/21)) - Page 888 - Android Forums