XL2CAD overcomes the limits and problems associated with placement of Excel spreadsheets inside Revit.  It creates and maintains DXF files of named ranges in Excel that are linked in Revit.  XL2CAD for Revit provides an accurate representation of the spreadsheet, including text, lines, fills, etc. It also was designed to maintain links so that changes to the spreadsheet will show the next time the Revit project is opened.

xl2revit

Details: http://www.dotsoft.com/revit