MultipleSearch is a vim plugin which allows multiple highlighted searches. I'm attaching an ebuild and the required tarball. The script header states the 'Vim' license, so no problems there. I've tested on x86 and sparc.
Created attachment 19942 [details] app-vim/multiplesearch 1.2.1 ebuild
Created attachment 19943 [details] multiplesearch-1.2.1.tar.bz2
Thanks again, Ciaran. By the way, you can make things just slightly faster for me by having KEYWORDS="~alpha ~sparc ~x86" :-)