Thought people may be interested in this. I have seen the previous model in action. This look to just be sweetening the deal. Can't send custom texts yet, but apparently send more custom messages.
There is a quick description from the website:
A detailed article on the new SPOT Messenger:The new SPOT Satellite GPS Messenger™ is 30% smaller and lighter than the original SPOT Satellite personal tracker, offers additional custom messaging modes, and uses a state-of-the-art GPS chipset and satellite communications to provide enhanced reliability and performance. SPOT LLC is showcasing its line of products and services this week at the Outdoor Retailer Summer Market Conference in booth number 36191 at the Salt Palace Convention Center in Salt Lake City, Utah.