We're finishing up an ASP.NET and SQL Server Reporting Services migration and trying to get the control working properly on a different server during deployment. Turns out there is a bootstrapper exe to run on the target server. Instructions on deployment can be found
here. At first I was just trying to track down the dlls and drop them in the bin directory, but I figured there was a better way and this is apparently it. You also have to add a new verb in the web.config section. Amazingly enough, the error that comes back tells you this and gives you the exact syntax, which is a nice surprise after some of the esoteric errors returned by previous versions of ASP.NET and Reporting Services.