Here's some very exciting information concering Lexzie, Callie/Hahn (I think we need a couple name for them by now!), and the big two-hour finale, Freedom, airing May 22! Thanks to Mike Ausiello at TVGuide.com.

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? 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."
Any hints on the Grey's Anatomy finale — especially Alex and Izzie? It's about damn time. That's your hint.

So, could the "big kiss" be another Hahn/Callie kiss? MerDer? Lexzie?! Or some couple we're not even thinking of....?