It does what it says on the tin.
Are you going to promote this in US or UK? I think that UK punters would like to see a dot org dot uk, but if you can get it high up on G then who cares?
A single click through will give you a good return on your $1.
I've just had a look on the GKT....the global exacts are the same as the uk so the UK may be the best target audience.
Look for a recent post about the 'Ministry of Justice' regulations regarding this stuff.
Cheers, Luke