Apologies -- the link was garbled (all the slashes got replaced by y's).
The corrected link for latest PNAS paper by Herndon, "Nuclear georeactor origin of oceanic basalt He-3/ He-4,
evidence, and implications" is
www.pnas.org/cgi/doi/10.1073/pnas.0437778100
...unfortunately this has only the abstract, the full paper being available to subscribers only.
( I happen to have a pdf copy )
Jaro