It's been a week now since ER/Studio Enterprise Portal was released, and so far the response has been overwhelmingly positive. Yesterday I mentioned that, while testing the portal, I find the Tomcat service management utility helpful. One of the things, in particular, that I do is change the amount of memory that the application server's Java virtual machine makes use of.
The portal isn't officially supported on Windows XP, but it will run on it. Depending on how much RAM the machine has, and how many other applications are running, the maximum memory pool needs to be lowered to something like 1024 or 512. There's a way to do this via the command line as well:
"c:\Program Files\Embarcadero\ERStudioEnterprisePortal1.0\tomcat\bin\tomcat5.exe" //US//Tomcat5ERSPortal --JvmMx=1024