Very handy utility-quick to use. I always do these checks anyways on my software, but usually only the boring names are taken! Also I don't want to take the opportunity away from any large company to name as they please, so I try to go down the adventurous road 1st.
I don't know how necessary it is to clear the name with social media sites, which I guess is what the "Know Me" search button does. Although I actually have avoided plugin names from that, simply because I don't want to be associated with some psycho.