Hope this will save somebody else some time.  There is a Joe Kunk webinar and while the technique of using a SQLDataAdapter is seductive, it doesn't work as shown.

Here's my solution :

http://www.devexpress.com/Support/Center/p/Q299515.aspx

Basically, you need to set the param and call the fill in the BeforePrint(), and be sure to reset the design-time sda param before you build (or export your reptx )

This was a head-scratcher but it is working great now - recommend you give it (and DevExpress in general ) a try.

Thanks Charles, good info.

Edhy Rijo

I'm a little less excited about it today as I can't seem to get the preview to work with string based params ( you do need to set the param to string.empty to get the run-time to work at all, but setting a "default" param on the SDA doesn't seem to work as it does for integers.  I may see if I can get DevExpress to fix this, since it is their previewer that is the issue.