EXCELLINK 2010 is an ARX application for AutoCAD 2010 - 32 / 64-bit (plus a separate version for 2009, 2008, 2007, 2006, 2005 and 2004, incl. Architecture, Mechanical, Map, Civil).
It allows to bi-directionally hot link attribute and geometrical block data (insertion point, scale, rotation..) between an AutoCAD drawing and an Excel 97 / 2000 / XP / 2003 sheet. Block properties can be driven from Excel. For room schedules, BOMs, lists, computed attributes, etc.
A separate version for AutoCAD LT is available.