I just got an email from Loopt that they have released a BlackBerry client for their social network. Personally I have no clue what Loopt does that Facebook does not but I am not much of a social networking buff.
So far the application seems to only be available for Sprint BlackBerry devices but supposedly Verizon BlackBerry support is coming soon. I am not sure why they would want to lock the network to only Verizon and Sprint but I guess that is their prerogative.
I did find that the registration link lets you choose to be from all of the different wireless carriers so maybe it works on other carriers? The application also seems to have a built in AOL IM client.
If somebody wants to sign up you can register for free at the link below:
Let us know if it is worth checking out.