i have just set up a frappr website after checking them out a few days ago from some links at moots and the transiowa websites.
it basically shows a US map and allows members of a group to create a little link on it so you can see all the other members and where they are at.
for instance, on the transiowa frappr website, you can see the hometown of all the racers who will be competing in the race. and at the moots frappr you can see a map of moots owners. very cool.
anyhoo, here is the link:
sologoat friends frappr website