Is there any way to turn off the "loading" message when a page refreshes in Reporting Services? I have a report that auto-refreshes every 30 seconds.  Usually this happens fast enough that you don't even notice.  Sometimes, however, the load takes a bit longer.  When this happens, the existing data is "greyed out" a bit, and a animated box that says "Loading" appears.

Is there any way to prevent the data from beign "greyed out"? I find it very distracting.  

The report is part of a monitoring tool.  We have it on a jumbo-tron.  Under certain conditions, it changes color, which catches people's attention.  The "greying out" also catches people's attention but for the wrong reason.
If you have an ASP.NET developer on hand, have them use the ReportViewer control to embed the report directly into a plain old aspx page. I've done this to a few reports, and they never show the usual "Report is being generated" message that you get when accessing them via Report Manager. (You might have to set AsyncRendering="False" on the ReportViewer control to get the desired behavior.)

This will also allow you to dress up the page a bit, and conceal the various Reporting Services toolbars, which would be ideal for a billboard display like you describe. Put a meta refresh in the page to get a 30-second refresh, and you're set.