Once you start down the path of redefining marriage to include anything other than the exclusive union of a man and a woman, it's not long before those who firmly disagree with that redefinition begin to see their values come under assault. And that is just what has happened in Illinois.
Christian bed and breakfast owners are being sued by homosexuals for not allowing the use of their facilities for a gay "civil union" ceremony. And since (as of this June) the state of Illinois legally allows such unions, the complaint is over discrimination, and the Illinois Attorney General's office is investigating.

From the story:
The owner of the first B&B, the Beall Mansion of Alton, Ill., had told the complainant, Todd Wathen of Mattoon, IL, that they only let out their premises for weddings. The Christian owners of the second, Jim and Beth Walder of TimberCreek Bed and Breakfast of Paxton, had a similar response.
In the course of e-mail correspondence with Jim Walder, Wathen argued: “starting June 1st, a civil union is a wedding, you have to get a licenses at the county clerks office, it is just not a marriage ... but a legal wedding ... so aren’t you discriminating against me and my partner, because of our sexual orientation??”