Well I have just gone through half of this process and will do the other half as soon as my insurance binder shows up. I bought my C6 from a dealer in New Hampshire and had it shipped down here. The dealer provided a 20 day temporary tag, which is on it now.
When I go to the tag office, I am expecting to have to pay Florida sales tax on the car when I register it here, as I did not pay New Hampshire sales tax (which there is NONE) when I purchased it. I would like to think I wouldn't have to pay that tax, but I suspect there is no way out of it..