SMS Reference Guide, update language

I got a little confused in your SMS documentation and had to spend some time really thinking it through.
http://brightkite.com/help/sms_reference

Your refer to location, place, and placemark independently but I think they mean the same thing.

in "Checking In", you refer to Location
in "Posting", you refer to Place
in "Places", you refer to Place

Please can you update these topics to use the same vernacular or at least define them? I recommend calling them all Location and Locations, leaving Placemarking as the specific task of adding a mark to a Location.