It’s been confirmed that you can marry anyone you want to in Elder Scroll V: Skyrim.
Someone quizzed Pete Hines via Twitter on the subject, saying “the subject seems like hush hush,”to which he replied:
“Not hush hush,” he replied, “just not making a huge deal out of it. You can marry anyone.”
Then followed up by saying, “Sorry, should clarify. Not any NPC, just mean any male or female. Doesn’t matter what you’re playing.”
Skyrim is out this November, and it seems if you want to get married, then you can. What a nice story.