Andrew, the best amoungst them I think are ipodcast.info and credited.info, these I can see being relevent to developed sites (also good names for sites are expirydate.info and prosac.info although I cannot see high PPC on a expirydate.info and prosac may be a TM'ed).
All would need work developing and I don't see even the ones mentioned above making a high ROI immediately and undeveloped, unless of course you can persuade a buyer of the development potential. But as always would love to be proved wrong!
Just my 2 cents.
Bill