It seems that Mcneel started testing a new user interface with the cool tab function. It allows you to easily intergrate your most used tools into Tabs.

rhino classic user interface

rhino new ui
Add tabs:

Add tabs
Usage:
If you want to switch to new ui, just type the command: testfancytoolbars and open your default toolbar layout(*.tb) or the file (*.rui) of Automatic Generation. The program will convert the toolbars you tick into tabs Automatic, You can also drag other toolbars whatever you want to insert an existing tab.
Other Commands:
TestsetPascalColors
TestSetdrawColors
LayoutWorkspace
testFancyToolBars
TestToolbarOptions
TestsetViewportBackground

You can even change the tab/background/… colors to match your taste.
Do you have some ideas about this new user interface? For me, it looks ok.

Designer: SKIDMORE, OWINGS & MERRILL LLP
PanelingTools is a powerful plugin that enables you to create complex structures and surfaces in rhinoceros easily. Now McNeel has released a new PanelingTools manual (about 80 pages), and new release are now available for download.
Download PanelingTools Manual for detailed description of commands and options.
Read more from McNeel Wiki
Tags:
This is work in progress (WIP).
Paneling Tools for Rhino 4.0 sr5 has been recently updated(June 8, 2009).
Download
A new release of PanelingTools plug-in for Rhino 4.0 SR5 is available for download from:
http://en.wiki.mcneel.com/default.aspx/McNeel/PanelingTools.html
Short video tutorials for PanelingTools Plug-in for Rhino 4.0.
Intro
lugins to demonstrate the Gumball transformation control.
Usage: Click this for more information
Moving the Gumball
Three types of transformation controls. To move the gumball, click, drag and release the controls. If you need to reposition the gumball without moving the objects it transforms, tap the CONTROL key while dragging a transformation control.

1. Translation controls:
- Click and drag on one of the arrows. The translation will move back and forth along the line the arrow lies on.
2. Rotation controls:
- Click and drag on one of the arcs.
3. Scaling controls:
- Click and drag on one of the small boxes.
- If you want uniform scaling, tap the SHIFT key while dragging a scaling control.
Download the Gumball plugins.
[via]Rhino Labs