Those who know...
It was released last year on Jul 18 09 as per my Subscription page. I do believe that was a late release date for the product. 2009 was released on April 20 08 so hopefully wee'll see it soon.
It really didn't look like there was much of a change from Raster 2010 to 2011 other than Windows 7 support and the ability to run it with the 2011 product series. Does anyone know if Raster 2011 will run with Civil 3D 2012? I haven't tried as of yet.
We use Raster extensively and as such upgrading Civil 3D is pointless until Raster will run along side of it - that meant waiting on last years Civil 3D upgrade 3 months.
I believe moving to the 64 bit environment (Win 7 support) was an issue that held it back.
There has been one 64 bit version of RD to date, RD 2011. 64 bit Autocad has been out for a few years. A 32 bit version of RD for 64 bit OS's have been previously released.