Mike Allen says Pelosi doesn’t have the public votes:

Speaker Nancy Pelosi counted votes Thursday night and determined she could not pass a “robust public option” — the most aggressive of the three forms of a public option House Democrats have been considering as part of a national overhaul of health care.
Pelosi’s decision—coupled with a significant turn of events yesterday during a private White House meeting—points to an increasingly likely compromise for a trigger option for a government plan.

But the public-option is far from dead yet, ABC emphasizes, via twitter:

jaketapper as @JonKarl reports, this is just the most robust public option she lacks the votes for — there will be a public option in the House bill