We picked these little guys up recently when we stayed in an RV park in Florida, though I guess they could have hitched a ride from anywhere. We see them frequently now (and webs all over the RV). If someone could identify them, we would greatly appreciate it!
CLOSED: Spider identification (FL)
I have seen similar looking spiders here in Michigan, if their range is this far north. Not sure about that though.
Except for the family Uloboridae, all spiders have venom glands; but the vast majority, including ghost spiders, are not dangerous to humans.