The ebuilds for app-admin/denyhosts do not contain the "arm" keyword, so it's impossible to install them on my NSLU2 without modifying the ebuild.
I take it this ebuild works once you add the arm keyword -- thanks for the report. You will probably be first to run arm on some other packages too, keep on filing reports as you run across them :)
Yes - the package works just fine. It's actually a python script, so I don't see how it wouldn't work on other platforms.
~arm added, closing, reopen in 30 days if you want it stable