Can high-tech cavemen live on the Moon?

On 8/5/06, Ed Minchau wrote:
(...)
> We have no idea what the long-term effects of living
> in 1/6 gee are. We only have two data points: 1g and
> 0g. Between those two data points, we don't know if
> there is a linear relationship between gravity and
> skeletal health, for instance. Whether a full gee is
> required for healthy living, or whether 1/6 gee would
> suffice, is completely unknown.
(...)

Indeed. And unfortunately a very promising experiment, like that
fractional gravity satellite for rats, apparently was forgotten in
some drawer. :-( Anyone has any news about the fate of that?