Now that IDEA 11 is finally out the documentation page has seen an update. Also the dedicated page for OGNL support has been overhauled, please check it to make best of these new features.
Did you check the Struts 2 screencasts yet (see documentation link above)? There are more to come to highlight the new features in IDEA 11 soon - stay tuned.
Work for upcoming 11.1 release has already started, please check back here to see when EAP is released.