I believe that Ethereal has improved greatly since when it was removed from ports. The only oddity I encountered is that pcre should be in WANTLIB, but it complained on install about not finding the appropriate pcre lib. I've added it to LIB_DEPENDS for now, but I don't think it belongs there.
Made with help from: http://www.linbsd.org/ethereal_on_openbsd37.html
ethereal.tgz
Description: GNU Zip compressed data
