Liz Mair at GOPProgress explains why she has dumped Duncan Hunter from her 2008 list.
I tend to agree with her reasoning on this. Hunter would not win the general election at all. He'd be a solid Secretary of Defense, but his approach to issues (not to mention the way he helped stab the UAE in the back) does not make him a viable option in 2008.
If people are looking for reasonable discussion about the issues with no name-calling (unlike other conservative forums), they can't do much better than GOPProgress. I would strongly recommend that site to anyone who wants to talk the issues and problems facing the country with an eye towards actually solving some of the damn things.