Spoiler under the cut
This is from Mega Buzz, but I found it on spoilertv.com.
So this isn't directly about Callie/Arizona. Eric Dane was talking about Mark and Lexie getting back together and people speculated that they were getting engaged. Now this makes me think otherwise. I mean I feel like it's unlikely that Mark/Callie would be anything else but sexbuddies, but still.
"Is there a marriage proposal coming up on Grey's Anatomy? - Monica
MICKEY: Yes, but not from whom you'd expect. A penniless patient of Dr. Webber's, played by Scott Foley, will pop the question to his girlfriend. He loves her, but he loves her health insurance more. You see, he's dying, and after multiple surgeries, he's also broke. Just when the hospital is about to kick him out, Teddy decides to take on his case pro bono. Maybe romance will be a factor after all."
Source:
http://www.spoilertv.com/2010/11/mega-buzz-various-shows-17th-november.html#ixzz15YSqreRY