Another example: do something a bit outrageous, but simple: watch some of the vid below: too many colons. That is pretty cool. An iphone is glued to the pavement! Now that is definitely different and gets people to stop. You could even make your own video, documenting your guerrilla marketing and develop a viral aspect and put it your Facebook, site, blog, YouTube. This is particularly risky, considering someone could easily trip over the glued phone. I would recommend a less risky alternative, like gluing the phone to a counter, wall or ceiling. Just an example to get you thinking about some guerrilla tactics your business could try out.