We've built our requirements management / project lifecycle management solution on top of Dojo & DWR. We're looking forward to porting to .9 for faster performance though we've done quite a bit with the build process for compression, etc already.

More info and sandbox is located at: http://www.jamasoftware.com

We've had good success with scaling and concurrent users so far but will continue to tune as we scale up to larger data sets and number of concurrent users. We'd enjoy sharing information or collaboration with others who are using Dojo for the enterprise application market. Drop us a line.

Video Tour is located here...
http://www.jamasoftware.com/videos.htm