What'd TV Guide say exactly? Because Michael Ausiello at tvguide.com just posted his Ask Ausiello column and here's the relevant part:

Question: So much for the suspense surrounding the big Grey's kiss. The new issue of TV Guide comes out and says it's Hahn and Callie! WTF? — Elizabeth

Ausiello: Au contraire, mademoiselle. The TVG article actually says Hahn and Callie smack lips this Thursday. The "major" kiss Shonda Rhimes was referring to takes place next week in the season-ender — and it may or may not pertain to a second, more passionate Hahn/Callie buss. This much I can confirm for you: The May 22 finale features several kisses, all of which I'd characterize as significant. But only one is so good that, to quote Rhimes, it will make you "lean into your televisions."

-----

Geoffrey: You fool! As if it matters how a man falls down.
Richard: When the fall is all that is left, it matters a great deal.

- The Lion in Winter

"Grey's Anatomy" actress, Sara Ramirez, was interviewed on ABC's "The View" today; and, one of the topics discussed was the Callie/Hahn relationship; here's her response:

"Yeah, it's so funny; it's so, it's so interesting; because, nothing's really happened, and yet; a lot of ; there's a lot of buzz, and a lot of speculation; and, perhaps some assumptions being made.  But, ah; but, I can't say.  And, ah; and, ah; what's gonna reall be...What would I like?...I think that "Grey's Anatomy" is a revolutionary show in terms of it's casting, and in terms of a lot of the universal truths; ah, in the relationships; the various relationships.  And, ah, if Shonda Rimes decides that she wants to expand that even furtherr, and expand our homophobic horizons; then, I think it would be great."

Then, they showed a scene from tomorrow's episode where they make fun of Sloan by playing up the three-way angle...A riot! :D