Robin Capper's 3 blog posts on AutoCAD 2006

AutoCAD 2006 Preview ~ What NO COMMAND LINE? ~ Dynamic input & Heads Up Design
"For the vast majority of the time I have found no need to display it – Heads up, you win!"

AutoCAD 2006 Preview ~ Customisation, Display and Selection Changes
"There are some significant changes to the user interface in AutoCAD 2006."
"There is a nice calculator built into AutoCAD 2006. "

AutoCAD 2006 Preview ~ Dynamic Blocks
"Dynamic Blocks are a major new feature in AutoCAD 2006. Simply put they are AutoCAD blocks that respond to user manipulation by altering graphics, shape or form. How they change is controlled by parameters built into the block using a suite of new tools."

AutoCAD 2006 Preview ~ Dimension Arc
"You can now dimension the length of an arc."