I think the reseller market for these domains will have to develope for a few years for people to be able to liquidate their brandable (but low traffic) 5 letter domains easily. There are opportunities to make money with them now but unless the domains pay for themselves, they are difficult to sell quickly at a definate market value.
I get the impression that the twists on CVCV are the most popular:
CCVCV.COM
CVVCV.COM
CVCCV.COM
CVCVV.COM
CVCVC.COM