"an Email enabled version of the bboard"
We were about to start on that, since threaded-bboard sucks. Could you post the code somewhere?
The main innovation of my.brandeis.edu that's generally useful is site-wide dynamic templating using ad_partner code. It's really quite trivial, for the 2-line patch against 3.4.10 see
http://samantha.unet.brandeis.edu:8001/cgi-bin/cvsweb.cgi/acs-core/document-procs.tcl.diff?r1=1.3&r2=1.4&sortby=date
Performance is excellent (essentially zero mariginal impact, assuming you're already using doc_return) and the effects can be dramatic.
http://my.brandeis.edu/gsief/news/
http://my.brandeis.edu/itc/gc/
http://my.brandeis.edu/black/news/