Is the SAS Web Applications timeout of 30 minutes still too short? You can modify these by following editing the .xml files listed on page 15 of SAS Web Application Administration Guide. Here are the steps I took to update the Portal, SAS Web Report Studio and the SAS Stored Process Web Applications with a 90 minute timeout.
1. Stopped Tomcat
2. Edited the Files listed below & changed the code from: &ltsession-config;>&ltsession-timeout;>30</session-timeout></session-config>
to:
&ltsession-config;>&ltsession-timeout;>90</session-timeout></session-config>

a. Portal and STP: SAS-install-dir\Web\Portal2.0.1\PortalWEBINFweb.xml
b. WRS: web.xml.host.tomcat and web.xml.trusted.tomcat found in: SAS-install-dir\SASWebReportStudio\3.1\config\Source\Java\resources
3.Redeploy the SAS Web Applications:
a. Portal and STP: configure_wik.bat and tomcat_deploy.bat (found in: SAS-install-dir\Web\Portal2.0.1)
b. WRS: sas.wrs.config.bat and sas.wrs.tomcat.deploy.bat (found in: SAS-install-dir\SASWebReportStudio\3.1)
4. Restarted Tomcat