Ok, so I'm really liking the #38.
I think if you could offer it without the star and one with just the new marker style.
Also I feel that the map within the chat bubble needs a little more of a map feel. Maybe with orange lines or something like
http://www.ubergeo.com/wp-content/uploads/2009/10/gm.png. Also what about a more oval, rounded chat bubble?
I really want the logo to communicate the way you have this concept of people chatting about a place/business. Nice work. Thanks!