Microsoft has released Visual Studio 2010 Pro Power Tools today adding lots of new tab options:
General Document Tab Well Options
Color Coding Document Tab Well Options
The Start Page tab after Power Tools installation
First things first – you can have multiple rows of pinned tabs now:
Multiple rows of pinned tabs
I.e. after you pin some tabs, they will take multiple rows if needed. “Normal” tabs are still form single row. Pinned tabs can’t be reordered by mouse.
Tabs can be arranged vertically, to the left of the code window. When needed pinned tabs take several columns:
Vertical tabs
Two columns of vertical tabs
In addition to the standard tab list drop down for hidden tabs, “Visual Studio 2003 tab scrollers” can be enabled:
The standard drop down and Visual Studio 2003 tab scrollers
I couldn’t make Remove tabs by usage order to remove tabs. All other options, I think, are self explanatory.
Tabs Studio is not currently compatible with this extension (generates null reference exception at startup). I will see whether it can be fixed.
Update: Tabs Studio v2.0.5 released with Visual Studio 2010 Pro Power Tools support (read more about how it is supported).
Tabs Studio Blog (organizing Visual Studio document tabs) 
Please disable change float (undock) tab on mouse double click, thanks…
Comment by ôstie — February 25, 2011 @ 9:28 pm
Thank you for the suggestion. I’ve disabled floating on double click.
Comment by Sergey Vlasov — March 1, 2011 @ 4:26 pm