Re: anyone attached a cycle rack to their Spider?
We had this same thing over the Brera, can't find anyone who has actually fitted one to the cars. In theory a standard generic cycle rack for hatchbacks will fit on the spider, but I wouldn't risk the paintwork.
I have checked and the Brera definitely has a tow hitch at the rear, slightly to the right, so the Spider should have one too. Best bet is to get a cycle rack that fits to the hitch. They do them for TTs and stuff, I'm sure those would fit the Brera/Spider