So I have recently started adding faces/names to my pics using Picasa which has gone well. I then added "regions" to Tag Cloud box "Fields to search".
The odd things is that it appears to take each word from the Regioname metadata and show them separately.
So If I have a photo with "John Smith" as the face name, it splits up "John" and "Smith" into two separate cloud tags, which seems odd and results in only being able to use Cloud Tags for "given name" or "surname" searches rather than specific names/people.