I don't really agree with sending to 3 different labels as i think a good label would want you as the artist you are as a whole and not just for 1 of your tracks.
I do have a clip of one of the tracks in a video on my facebook page but I do like keep my cards close to my chest so currently no other clips are out there :p Just waiting on 1 track to get back from mastering then I will be ready to start sending out.
That is true, but if they are really diverse, it makes much more sense to send to different labels, than all to the same one. You would be expanding your portfolio and network if send to separate labels.