Hey all,
Currently the Minor Sigil of speed (Grants a swiftness boost for 5 seconds after killing a foe) grants a permanent (until logout or teleport) +33% speed buff. Very simple, Kill a mob, boom, 33% speed.
I currently have mine attached to my warhorn, I have no idea if it works with anything else.
http://twitch.tv/knowledged3/b/330397326
Note : I have reported this to GW2
Video is terribad since my internet sucks