Haha, you'll notice hackhackgo.com redirects to the same place :). We had a large internal debate about the name and it came down to these two, with hacksear.ch in third.
+1 "DuckDuckHack"
If it hacks like a duck...
You compared this to Firefox Add-ons. Does that mean that these won't be integrated into DDG natively? Will that only be at your discretion?