I got these clips from the alexolivia group at yahoo -- thanks! They are in Windows Media Player format (.wmv).
From Alex's farewell episode, "Loss" (in which she gets too involved in a case, and ends up having to go into witness protection after everyone is told she is dead):
In the following episode ("Serendipity"), Alex's replacement, ADA Casey Novak, gets personal with Olivia.
And here's my favorite random slashy scene from SVU Potluck (which also has the Loss clips above, and Mariska Hargitay's controversial comment on Conan).
You can download more "subtext-astic" SVU clips here.
Mariska
Mariska is the coolest Actress I want to be just like her!