From [1]:

In a post to the list-serv Journolist, an online meeting place for liberal journalists, (NPR producer Sarah Spitz) wrote that she would “Laugh loudly like a maniac and watch his eyes bug out” as (Rush Limbaugh) writhed in torment [from a heart attack].

In boasting that she would gleefully watch a man die in front of her eyes, Spitz seemed to shock even herself. “I never knew I had this much hate in me,” she wrote. “But he deserves it.”

UPDATE: Spitz was misidentified as an NPR employee and the title has been corrected (link):

In fact, Spitz has never been an NPR employee. For many years, she has worked for KCRW, a public radio station in Santa Monica, California, as a producer and publicist... KCRW is one of some 900 independently-operated public radio stations across the country that air NPR's news, talk and entertainment programming. Like network TV affiliates, they air national programming but act autonomously.

She's also issued an apology:

I made poorly considered remarks about Rush Limbaugh to what I believed was a private email discussion group from my personal email account. As a publicist, I realize more than anyone that is no excuse for irresponsible behavior. I apologize to anyone I may have offended and I regret these comments greatly; they do not reflect the values by which I conduct my life.

From [2]:

In a post to the list-serv Journolist, an online meeting place for liberal journalists, (NPR producer Sarah Spitz) wrote that she would “Laugh loudly like a maniac and watch his eyes bug out” as (Rush Limbaugh) writhed in torment [from a heart attack].

In boasting that she would gleefully watch a man die in front of her eyes, Spitz seemed to shock even herself. “I never knew I had this much hate in me,” she wrote. “But he deserves it.”

UPDATE: Spitz was misidentified as an NPR employee and the title has been corrected (link):

In fact, Spitz has never been an NPR employee. For many years, she has worked for KCRW, a public radio station in Santa Monica, California, as a producer and publicist... KCRW is one of some 900 independently-operated public radio stations across the country that air NPR's news, talk and entertainment programming. Like network TV affiliates, they air national programming but act autonomously.

She's also issued an apology:

I made poorly considered remarks about Rush Limbaugh to what I believed was a private email discussion group from my personal email account. As a publicist, I realize more than anyone that is no excuse for irresponsible behavior. I apologize to anyone I may have offended and I regret these comments greatly; they do not reflect the values by which I conduct my life.

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[1] dailycaller . com/2010/07/21/
liberal-journalists-suggest-government-shut-down-fox-news

[2] dailycaller . com/2010/07/21/
liberal-journalists-suggest-government-shut-down-fox-news