I haven’t used this product, other DotSoft stuff I’ve tried has been great, but it gets a mention due to the lovely ascii art diagram* that featured in the plain text email that announced it. Who needs Visio…
DotSoft has developed a revolutionary new way to solve the old problem of placing Excel spreadsheets into CAD applications. The result is Excel2DWG. We moved all the processing code inside Microsoft Excel, directly creating a DWG file of areas. You simply select your area of interest and click an icon to create the DWG file. The best part is that as changes are made, the DWG files are updated when the spreadsheet closes.
We found that many groups use a mixture of products in completion of projects. Now those groups can reference a single file across the entire project, regardless of the application!
Details: http://www.dotsoft.com/excel2dwg.htm