I know I'm late to this thread, and so my apologies, but:
Can someone believe in ghosts or believe in ESP or believe in UFOs or believe in reincarnation or believe in God...and still be a skeptic?
Yes, as long that person can admit that it is an irrational belief in the face of the evidence available.
I would present this another way.
A person is...
afraid of going outside.
afraid of small closed in spaces... I fall into this category

afraid of small insects with eight legs.
afraid of the dark, with no good reasonable explanation.
afraid to consider that there likely is no life after death.
afraid to think that there is no great deity watching out for us.
afraid to think that bad things may actually happen to good people without reason.
They can still be a skeptic, can't they?
There are so many reasons why giving up a belief in God may be hard/difficult/even impossible.
That doesn't mean a person can't be a good skeptic.
Inability to face down an irrational fear or belief does not make one incapable of skepticism or critical thinking.
It is important though, to be able to admit to the irrationality and work hard not to let it color conclusions and statements of fact.
Consider, I think that Randi himself would be ready to declare that telepathy existed if it were reproduced and verified under the correct scientifically controlled conditions.
Given that there is no proof that there is not a god.
Can an atheist be a good skeptic?
Or should all skeptics be only agnostics?