[clare]

Exact my thought too, Greplin seems to be open to public signup yesterday, and it will be really interesting to see which social search will take off. Google seems to provide a superset of what Greplin provides (your own social data plus your social network's data), and Google definitely has the advantage of being a bigger name, which might mitigate some users' concern about privacy or security; on the other hand, Greplin is really focused on this one particular service and employs a really straightforward approach, which might actually be more preferrable to other users. Google's social search might be lost in a whole slew of other services, unless they focus on marketing and education about it.