Chris,

I wrote a free utility specifically for working with SAS and Excel that provides a large amount of customizations and options including style support, multiple dataset insertion, moving data into and out of Excel, etc.

http://utilities.savian.net

Look at SaviCells.

It uses XML as the needed markup.

Since that was put out there, a need arose for far greater customization. Hence, there is another version that is not in the public domain that is way more flexible and powerful. It includes supports for charts, printing, premade Excel templates. We are using this with SAS/IntrNet and producing great Excel sheets.

Alan